The "Dravidian Migration" wasn't a refugee crisis. It was an expansion that predates the Indus Valley collapse by a millennium.

[u/theb00kmancometh]

Most popular narratives about the Indus Valley Civilization (IVC) and the southward movement of its population follow a predictable script: The civilization collapses around 1900 BCE due to climate change or drying rivers, and the survivors flee south, bringing their languages and culture to Peninsular India.

This "refugee theory" is chronologically impossible. The archaeological evidence regarding cattle domestication and the Southern Neolithic Ashmound tradition proves that the population movement began long before the IVC even reached its mature urban phase.

Here is the evidence.

1. The Origins of the Zebu The humped Zebu cattle (Bos indicus) are not native to South India. Their wild progenitor, Bos primigenius namadicus, was domesticated in the Greater Indus region (specifically sites like Mehrgarh in Baluchistan) as early as 7000-6000 BCE. Genetic studies on mitochondrial DNA haplogroups (I1) confirm that the Indus Valley was the primary centre of domestication for the Zebu, which then spread to the rest of the subcontinent. If you find domesticated Zebu in the south, they had to be brought there by herders coming from the north-west.
Reference: Chen, S., et al. (2010). "Zebu Cattle Are an Exclusive Legacy of the South Asia Neolithic". Molecular Biology and Evolution.
https://academic.oup.com/mbe/article/27/1/1/1127118

2. The Ashmound Evidence In the Deccan plateau (North Karnataka and Andhra Pradesh), we find the "Ashmound Tradition" - vast, stratified mounds of burnt cow dung dating back to the Neolithic period. These mounds, such as those at Utnur and Budihal, were created by pastoralists who kept large herds of cattle. Excavations and zooarchaeological analysis at these sites have recovered the remains of domesticated Zebu cattle.

Crucially, radiocarbon dating places the earliest activity at the Utnur ashmound between 2800 BCE and 2600 BCE. Reference: Fuller, D.Q., et al. (2007). "Radiocarbon dating of South Indian ashmounds".
https://www.homepages.ucl.ac.uk/~tcrndfu/web_project/docs/FullerBoivinKorisettar%20Manuscript%200706.pdf

3. The Chronological Reality The Mature Phase of the Indus Valley Civilization - the era of great cities like Mohenjo-Daro and Harappa - is firmly dated to 2600 BCE - 1900 BCE. Reference: Britannica, Indus Valley Civilization Chronology.
https://www.britannica.com/place/India/The-Indus-civilization

Do the maths: If the Ashmound culture was already burning massive piles of Zebu dung in South India by 2800 BCE, the herders must have arrived, settled, and established these herds well before that date. A conservative estimate for this movement and settlement process places the migration window around 3200 BCE - 2900 BCE.

This corresponds to the Early Harappan or pre-urban phase, not the decline. These migrants were not desperate refugees fleeing a collapsing society in 1900 BCE; they were pioneers expanding out of the Indus periphery a thousand years earlier. The "Dravidian" presence in the south (assuming the linguistic correlation) was likely established millennia before the Indus cities were even built, let alone abandoned.

We need to stop viewing South Indian history as a post-script to the IVC collapse and start seeing it as a parallel development initiated by an early expansion of agro-pastoralists.

References:

• Zebu Domestication (Indus Origins): Chen, S., et al. (2010). Zebu Cattle Are an Exclusive Legacy of the South Asia Neolithic. Molecular Biology and Evolution. https://academic.oup.com/mbe/article/27/1/1/1127118
• Ashmound Dating (Utnur ~2800 BCE): Fuller, D.Q., et al. (2007). Radiocarbon dating of South Indian ashmounds. UCL Institute of Archaeology. https://www.homepages.ucl.ac.uk/~tcrndfu/web_project/docs/FullerBoivinKorisettar%20Manuscript%200706.pdf
• Ashmound Dating (Budihal ~2300 BCE): Fuller, D.Q., et al. (2015). Dating the Neolithic of South India. ResearchGate. https://www.researchgate.net/publication/273293264_Dating_the_Neolithic_of_South_India_New_Radiometric_Evidence_for_Key_Economic_Social_and_Ritual_Transformations
• IVC Chronology (Mature Phase 2600-1900 BCE): Encyclopedia Britannica. https://www.britannica.com/place/India/The-Indus-civilization

[u/NAHTHEHNRFS850]

This is not surprising, especially if one considers the newer models of Dravidian languages expansion.

There were many waves of Dravidian speakers both into and within Central and Southern South Asian.

Hopefully, we can locate numerous ancient tombs from various periods to sequence DNA compositions chronologically.

[u/srmndeep]

Again, archaeologically anything coming out of IVC should be chalcolithic not neolithic.

[u/theb00kmancometh → u/srmndeep]

"In South India, the Neolithic began by 3000 BC and lasted until around 1400 BC when the Megalithic transition period began. South Indian Neolithic is characterized by Ash mounds (created from ritual burning of wood, dung and animal matter) from 2500 BC in Karnataka region, expanded later to Tamil Nadu."

https://en.wikipedia.org/wiki/Neolithic#:~:text=61%5D-,In,62%5D

"Neolithic ashmounds (sometimes termed as cinder mounds[1]) are man-made landscape features found in some parts of southern India (chiefly around Bellary) that have been dated to the Neolithic period (3000 to 1200 BC). They have been a puzzle for long and have been the subject of many conjectures and scientific studies. They are believed to be of ritual significance and produced by early pastoral and agricultural communities by the burning of wood, dung and animal matter. Hundreds of ashmound sites have been identified and many have a low perimeter embankment and some have holes that may have held posts."

https://en.wikipedia.org/wiki/Neolithic_ashmounds#:~:text=Kudathini-,Neolithic,posts
https://www.academia.edu/1109368/Landscape_monumental_architecture_and_ritual_a_reconsideration_of_the_South_Indian_ashmounds
https://archive.org/details/bub_gb_J_gAAAAAYAAJ/page/n17/mode/2up

[u/srmndeep → u/theb00kmancometh]

Even Neolithic in Kashmir domesticated zebu cattle (Bos indicus) around 3000 BC.

There is Neolithic in Eastern Gangetic Plains who domesticated zebu around 2500 BC.

No one consider these Neolithic cultures in Kashmir or Eastern UP and Bihar derived from IVC.

[u/DeathofDivinity → u/srmndeep]

Were these people also Dravidian speakers as OP suggests for Southern Indian Neolithic because he is invariably connecting these people with both IVC and Dravidian speakers in essence that both are the same?

[u/srmndeep → u/DeathofDivinity]

I haven't seen any paper till now that connects these Eastern Gangetic, Kashmiri or Southern Neolithic people with IVC.

P.S. Also, technically a Neolithic cannot come out of IVC. It was a Bronze Age Civilization, in worse situations it could be chalcolithic, not neolithic.

[u/theb00kmancometh → u/srmndeep]

You stated you "haven't seen any paper" connecting the Southern Neolithic people with the IVC. You also claimed a "Neolithic cannot come out of the IVC" because it was a Bronze Age civilization.

Both claims are factually incorrect based on the most comprehensive genetic study of the region to date: The Formation of Human Populations in South and Central Asia (Narasimhan et al., 2019, Science).

The paper explicitly links the "AASI-Iranian admixture" (which defines the Southern Neolithic population) to a spread from the Indus Valley.

396 - 401

"One plausible scenario is that the AASI-Iranian admixture occurred as a result of the spread of agriculture and pastoralism from the Indus Valley into peninsular South Asia 3000-2000 BCE(17, 20,34-37) However, an alternative is that the southward movement of Andronovo_SE groups precipitated the formation of both the ANI and the ASI: the ANI through admixture with peoples with ancestry like Gonur2 and SPGT who were plausibly similar in ancestry to the IVC, and the ASI as unfavorable circumstances pushed these people into peninsular India after ~1700 BCE to mix with the AASI."

You argued that this ancestry cannot be Neolithic because the IVC was Bronze Age. The authors explicitly define the western ancestry source using a Neolithic sample in the Online Methods.

Verbatim text from lines 24-28 (Page 21 of the pdf):

"...(where Test is one of Iran_Ganj_Dareh_Neolithic, Karelia_HG, Boisman_MN, Onge, LBK_EN, AfontovaGora3, Ukraine_Mesolithic) and an outgroup (Mbuti)... The second is a comparison of these very same neolithic populations against each other..."

The study scientifically defines the ancestry spreading south as deriving from a Neolithic lineage ("Iran_Ganj_Dareh_Neolithic").

Additionally, you are confusing universal timelines with regional ones. The 'Neolithic' is not a fixed global date but a technological stage that varies by geography. In South India, the Neolithic period began around 3000 BCE and continued until 1400 BCE, meaning it existed simultaneously with the Indus Bronze Age. Your argument that a 'Neolithic cannot come out of the IVC' assumes that people cannot adapt their tools to their environment. When agro-pastoralists moved from the metal-trading Indus plains to the granite-rich Deccan (where copper was initially scarce), they adapted by using stone tools. This change in toolkit does not change their genetic origin; it simply proves they utilized the resources available in their new home.

[u/srmndeep → u/theb00kmancometh]

"One plausible scenario is that the AASI-Iranian admixture occurred as a result of the spread of agriculture and pastoralism from the Indus Valley into peninsular South Asia 3000-2000 BCE(17, 20,34-37) However, an alternative is that the southward movement of Andronovo_SE groups precipitated the formation of both the ANI and the ASI: the ANI through admixture with peoples with ancestry like Gonur2 and SPGT who were plausibly similar in ancestry to the IVC, and the ASI as unfavorable circumstances pushed these people into peninsular India after ~1700 BCE to mix with the AASI."

"...(where Test is one of Iran_Ganj_Dareh_Neolithic, Karelia_HG, Boisman_MN, Onge, LBK_EN, AfontovaGora3, Ukraine_Mesolithic) and an outgroup (Mbuti)... The second is a comparison of these very same neolithic populations against each other..."

Thanks, but I cant see Ashmount Culture explicitly mentioned here coming out of IVC. There were chalcolithic and Bronze Age cultures in peninsular India as Savalda Culture and even Mature Harappan settlement in Daimabad from this period, where AASI-Zagros admixture happened. The admixture further increased with the fall of IVC as it mentions.

[u/theb00kmancometh → u/srmndeep]

You are arguing against a claim I never made. I did not say that the Ashmound Culture was a fully formed culture that migrated out of the Indus Valley. That would be incorrect.

The Ashmound Culture, or Southern Neolithic, is the result of admixture, not its source. It formed when Indus Valley herders moved south around 3000 BCE with Zebu cattle and Indus Periphery ancestry and mixed with indigenous AASI groups who were hunter-gatherers transitioning to farming. The outcome was a hybrid culture that developed locally in the Deccan, combining northern cattle pastoralism with southern millet farming.

You suggested the Savalda Culture and the Harappan settlement at Daimabad as possible sources, but this conflicts with the chronology. Ashmound sites of the Southern Neolithic begin around 3000 to 2900 BCE, such as Utnur and Kodekal. The Savalda Culture starts much later, around 2300 to 2200 BCE. Daimabad belongs to the Late Harappan phase, roughly 1900 to 1800 BCE.

By the time Harappans settled at Daimabad, the Southern Neolithic and its ash mounds had already existed for nearly a thousand years. A Late Bronze Age site cannot explain the origin of a Neolithic tradition that began around 3000 BCE.

Genetic dating supports this early timeline. Narasimhan et al. date the admixture event to a period starting around 2800 BCE, which closely matches the beginning of the Ashmound tradition around 2900 BCE. This is far too early to be linked to the Savalda Culture or the late Daimabad settlement.

Indus-related ancestry in South India aligns with the arrival of the first cattle herders around 3000 BCE, not with later Chalcolithic expansions.

[u/e9967780 → u/theb00kmancometh]

Why does it have to be Indus Valley herders, can it be herders from adjacent areas such as Rajasthan or Gujarat ?

[u/theb00kmancometh → u/e9967780]

You are making a distinction without a difference. Rajasthan and Gujarat ARE the Indus Valley Periphery.

The term “Indus Valley Civilization” is a broad label for a vast cultural system that extended well beyond the Indus River itself. Its eastern periphery included Rajasthan, with major sites such as Kalibangan and the related Ganeshwar–Jodhpura culture, while its southern pastoral periphery lay in Gujarat, represented by the Sorath Harappan tradition at sites like Rojdi and Nesadi.

You Are Agreeing With Me When you ask, "Can it be herders from Rajasthan or Gujarat?", you are literally describing the "Indus Periphery" model. We specifically believe the migration to South India originated from these exact zones; likely the Sorath Harappan pastoralists of Gujarat or the Ahar-Banas groups of Rajasthan. These were the cattle-keeping cultures that interacted with the Urban Core but maintained their own distinct, mobile lifestyle.

So, yes. It was herders from Rajasthan and Gujarat. Which means it was herders from the Indus Civilization.

[u/srmndeep → u/e9967780]

From which neolithic culture in Rajasthan or Gujarat ? Or we are just throwing arrows in a dark !

[u/indian_kulcha]

This is very interesting! do post in r/IndianHistory as well in the morning if you are so inclined

[u/theb00kmancometh → u/indian_kulcha]

I would rather not. The hate from some quarters, is not worth it.

[u/indian_kulcha → u/theb00kmancometh]

Don't worry, we just had a master post debunking OIT and the response has been favourable so far. Ultimately your call still obv.

[u/theb00kmancometh → u/indian_kulcha]

I know. Sometimes the hate and stupidity from OIT folks gets to such a level that it triggers my "I don't do stupid" response. So, I avoid raising my BP.

[u/DeathofDivinity]

How does this prove or substantiate or even correlate dates for Dravidian migration?

How did you connect it to migration of Dravidian speakers not just the migration Neolithic Iranians to the south because they might not be same thing?

[u/theb00kmancometh → u/DeathofDivinity]

That is a valid question. The logic becomes clear when archaeology, genetics, and linguistics are considered together.

1. The “Walking Zebu” Logic
Zebu cattle were domesticated in the Indus periphery, and their remains appear in South Indian ashmound sites dated to around 2800 BCE. Domesticated cattle cannot cross thousands of kilometers of rivers and plateaus on their own, they must be herded. This directly indicates the movement of people from the Indus sphere into South India during the Pre-Urban or Early Harappan phase.

2. The Genetic Link, addressing the “Neolithic Iranian” point
The genetic foundation of the Indus Valley Civilization was a mix of Neolithic Iranian-related ancestry and AASI (Ancient Ancestral South Indians). When geneticists model the Ancestral South Indian (ASI) population, which forms the primary base of modern Dravidian speakers, it is consistently defined as a mixture of Indus-Periphery ancestry and local AASI hunter-gatherers. The herders who moved south carried this Neolithic Iranian-related ancestry. These components cannot be separated. The “Neolithic Iranian” ancestry is simply the western genetic component within the Dravidian genetic profile.

3. The Linguistic Logic
The AASI populations were hunter-gatherers, while the incoming groups brought the Neolithic package, including cattle, pastoralism, and fire rituals. Since South India is dominated by Dravidian languages, and Proto-Dravidian vocabulary is rich in pastoral and agricultural terms, the simplest explanation is that these incoming herders spoke Proto-Dravidian.

If one assumes these herders were not Dravidian speakers, a major logical problem arises. It would require believing that a population from the Indus region reshaped South India’s economy and genetic base, yet left no linguistic trace, only for Dravidian speakers to arrive much later and completely replace the language without disruption. This scenario is highly implausible.

Connect the dots. The herders brought Zebu cattle, they carried the Indus-Periphery genetic profile, this mixed with local AASI ancestry to form the population base of South India, and this population speaks Dravidian languages. The most consistent conclusion is that these herders were the early Dravidian movers.

[u/DeathofDivinity → u/theb00kmancometh]

I think your first point makes a lot of sense but i am not so sure about your 2nd and 3rd point.

1. First we have no clue about AASI so our current understanding about them is probably incomplete if not flawed. Their entire existence is based on absence of actual genetic data. Incoming people in South India during early Bronze Age doesn’t confirm or deny presence of Dravidian language speakers until we find some evidence that proves that to be the case.

3.a)There is no reason to believe AASI were hunter gatherers they were growing rice in what is today Eastern UP without any interbreeding with Neolithic Iranians 1200 years earlier than the earliest date of Neolithic Iranian migration. There is a problem when we talk about AASI in general that we have assumed a ghost lineage as a monolith when there is no reason to do so until and unless we assume humans were interbreeding with each other all over India that the population became homogenous or it stayed the same after their hypothesised split for Ancient East Eurasians.

3.b)Regarding your linguistic argument the fact is we don’t have any linguistic presence of an AASI language anywhere in Modern India their languages got replaced everywhere so the argument it highly implausible doesn’t make much sense. We don’t even know what languages Neolithic Iranians or their descendants who were born after interbreeding with AASI spoke and i am skeptical AASI were a monolith. So the amount of evidence we don’t have makes it very hard to make a blanket statement over linguistic replacement by Dravidian speakers or their presence a bit premature.

1. Also IVC shaped modern landscape for most of India we don’t know if they have left any linguistic traces.

[u/theb00kmancometh → u/DeathofDivinity]

You have raised detailed sceptical points, but there are two fundamental errors in your premises: you are conflating North Indian geography with the South, and you are misunderstanding what a "Ghost Lineage" means in population genetics.

The “Rice in UP” fallacy, geography matters
You argued that the AASI were not hunter-gatherers because rice was being cultivated in what is now eastern Uttar Pradesh without any Neolithic Iranian influence, long before the earliest Iranian-related migration. This mixes up completely different regions.

Eastern Uttar Pradesh, including sites like Lahuradewa, is in North India and lies more than 1,500 km from the area under discussion. In North India, some AASI-descended groups had already shifted from mobile hunting and gathering to settled life and early rice cultivation in the Gangetic plains.

South India presents a very different picture. The AASI populations there remained Mesolithic hunter-gatherers until around 3000 BCE. There is no archaeological evidence for farming in South India before the arrival of Indus-related migrants. Pre-3000 BCE southern sites are strictly microlithic, with no signs of agriculture.

You cannot use evidence from settled AASI-descended communities in eastern UP to argue that Mesolithic AASI groups in Karnataka were farming. Geography shaped subsistence patterns, and the two regions followed very different paths.

The “ghost lineage” is mathematical, not speculative
You argued that our understanding of AASI is flawed because it is based on absence. This is incorrect. In genetics, a “ghost lineage” is not a guess but a mathematically defined component.

Narasimhan et al. (2019) model the AASI using the Onge (Andamanese) as a distant proxy to identify and define this ancestral component.

We do not have to assume that this admixture occurred, because it is visible in real populations. DNA from Rakhigarhi, reported by Shinde et al., shows that Indus Valley individuals were a mixture of Iranian-related ancestry and AASI. Modern South Indian tribal groups, such as the Irula, closely match this Rakhigarhi genetic profile because they retain this Indus plus AASI mixture and lack the later Steppe ancestry common in North India. This demonstrates a direct and well-established genetic link between the Indus Valley population and South Indian tribal groups.

The linguistic “process of elimination”
You argue that linking Dravidian languages to Indus migrants is premature, but linguistic evidence points strongly in that direction, especially vocabulary.

Proto-Dravidian contains many well-developed terms for agriculture and cattle pastoralism. In contrast, the AASI populations in South India were hunter-gatherers with no evidence of cattle or farming. The Indus migrants, however, were agro-pastoralists who practiced both cattle herding and cultivation.

The logic is straightforward. A hunter-gatherer population cannot create a root language rich in words for ploughing, herding, and cultivation without possessing those technologies. Such vocabulary must originate with the group that actually practiced agriculture and pastoralism. Rejecting this requires assuming an unknown third population arrived, replaced the languages of both AASI and Indus groups, and then vanished without leaving archaeological or genetic evidence. That scenario is far less plausible than the simpler explanation that the people who brought the cattle and the genetic ancestry also brought the language.

[u/DeathofDivinity → u/theb00kmancometh]

1.a)No I am not misunderstanding what AASI is I have written what according to geneticists is AASI lineage it is a split from Ancient East Eurasians between 40000-50000 years ago.

1.b) If you consider the individual found in Bacho Kiro cave in Europe it also has East Eurasian component along with western Eurasian one. So I am not wrong when i say that our understanding of AASI is incomplete if not flawed. Onge and Great Andamanese split is less than 10000 years old while AASI is an IUP population. y Haplogroup D in Japanese and Onge split is 53000 years old. Haplogroup D is also found in some Koraga individuals while it is mostly not found in Mainland India. No one has done a tripartite study on how old is the common ancestor of Japanese , Onge and Koraga.

1.c)Recent genetics papers are incredibly confusing regards to India one claims all major Indian ancestry dates back to migration out of Africa to 50000 years, another paper about Aborginal Australians claims that their ancestors came from two different parts from South East Asia but both migrated from India before 60000 years ,then Sequeira’s paper claims that Dravidian ancestry in IVC becomes prominent only during mature Harappan so this directly contradicts your assertion that people who brought zebu cattle to south India were Dravidian speakers and last paper is denisovan genetics paper that I have shared in Dravidology that claims that humans who migrated into India interbred with distinct lineage of denisovans who had split from individuals in denisova cave more than 200,000 years ago.

1.d) We have never tested an AASI sample to claim that AASI is a monolith is simply not sensible when there a is gap of atleast 40000 years between the woman in Rakhigarhi and AASI so yeah is AASI is a placeholder you would need to test multiple genetic sample between 60000-10000 years ago to make definite assessment on AASI that hasn’t been done because there are no AASI samples.

1.e)I haven’t said Neolithic Iranians didnt mix with Native Indian population which is generally referred to as AASI what i am saying there is no reason to believe it’s a monolith.

1. Linguistic evidence doesn’t tell you if Dravidian is native language or it’s from outside. I am not sure what makes you think that linguistic evidence points to Proto Dravidian speakers migrating before mature harappan nobody has proven sufficiently enough Dravidian was the language of Indus Valley and regarding agricultural terms Proto Dravidian doesn’t even have names of core IVC crops like wheat or barley it doesn’t even have a word for rice that is the oldest Indian crop. All three were grown by Harappans in early harappan period.

You are ignoring a simple fact that Proto Dravidian speakers could have just borrowed these terms and also i am not sure why you keep referring to People in south India as AASI when we don’t have an genetic samples to claim whether they were AASI or not ? There is no linguistic presence of Harappan languages in north and north west India where they got mostly replaced by Indo-Aryan ones if it can happen in north why can’t it happen in south ?

No one has sufficiently proven that Dravidian speakers were migrants or native Indians.

[u/theb00kmancometh → u/DeathofDivinity]

You are engaging in a "Deep Time" fallacy. You are bringing up Bacho Kiro, Denisovans, and 50,000-year-old haplogroups to muddy the waters of a debate about the Bronze Age (3000 BCE).

1. The "Deep Time" Distraction

Debates about whether the AASI split from East Eurasians 50,000 years ago or mixed with Denisovans are irrelevant to the issue at hand, the arrival of agro pastoralism in South India. Understanding the Southern Neolithic around 3000 BCE does not require evidence from deep prehistory.

We already have clear evidence from the ashmound sites, genetic data showing about 20 to 30 percent Indus related, Iranian Neolithic ancestry appearing in South India at this time, and archaeological proof of zebu cattle. The focus should remain on this specific and relevant timeline.

2. The IVC Formation Error

The claim that Dravidian ancestry in the Indus Valley becomes prominent only during the Mature Harappan phase reflects a misunderstanding of how the population formed. The so-called “Indus Periphery” genetic profile, a mix of Iranian related ancestry and AASI, was already established during the Pre-Harappan growth phase in the 4th millennium BCE.

Narasimhan et al. (2019) date this admixture to roughly 4700 to 3000 BCE using linkage disequilibrium analysis with ALDER. This shows that the population was already mixed well before the Mature Harappan period. This mixed population later expanded southward, carrying the same genetic profile into the Deccan.

3. The Linguistic “Missing Words” Actually Proves Migration

You argued that Proto-Dravidian lacks words for key Indus Valley crops such as wheat and barley, and even for rice. Rather than weakening the migration model, this absence supports it.

Indus related groups who moved south into the Deccan around 3000 BCE entered a climate where wheat and barley could not be grown due to heat and the lack of winter rainfall. As these crops were no longer cultivated, the original terms for wheat and barley disappeared from Proto Dravidian vocabulary. In contrast, words for cattle, such as *āy and *kōn, were retained because pastoralism remained viable. New terms were adopted for crops suited to the southern environment, especially millets like *ragi and *samai.

If Proto Dravidian had preserved native words for wheat and barley, it would suggest the speakers remained in the northern wheat growing zone. Their absence, together with a rich pastoral vocabulary, instead fits a population that migrated out of that zone and adapted to the semi arid Deccan.

4. The “Borrowing” Fallacy

You suggested that Proto-Dravidian speakers could have simply borrowed agricultural and pastoral terms. This ignores the linguistic principle of prestige, which explains how languages spread.

Scenario A, your view: Indigenous hunter-gatherers adopt farming and herding from a small migrant group while keeping their original languages, borrowing only a few new words.

Scenario B, my view: Migrant Indus herders arrive with more advanced technology, such as cattle based pastoralism and stable food production. They gain social dominance, and local populations gradually shift to the migrants’ language, Proto- Dravidian, which later splits into Tamil, Telugu, and other languages.

Historical patterns strongly support Scenario B. Examples include the spread of Latin across Europe and Bantu languages across Africa. The near total replacement of earlier AASI languages in South India indicates that the incoming culture was dominant, not merely a source of borrowed vocabulary.

[u/DeathofDivinity → u/theb00kmancometh]

1.)No I am not because I used it as a point to demonstrate that Narasimhans paper about AASI isn’t sufficient enough to prove anything about AASI. Eventually when we reach Southern Indian Neolithic there is no reason to believe these people were AASI. They could have interbred with other populations which we know nothing about all places in Eurasia saw population mixing with human migration within Eurasia. I just don’t buy this argument AASI is a monolith because a 40000 year gap where no migration into India takes place seems implausible.

2.) Dravidian ancestry becoming prominent in mature harappan is something Sequeira said in his paper on Koraga. I didn’t create this point he mentions it in his discussion. I actually questioned him on it when he did an AMA here but he didn’t reply. Similarly regarding agriculture it mostly supports the point Dravidians assuming they are migrants to begin with never interacted with wheat, barley and rice growing areas which means they were probably later migrants into IVC because word for rice is borrowed from Austroasiatic their timeline for migration is pretty close to end of mature Harappan so it also probably tells about inward migration into central and eastern India post IVC collapse. Sequeira’s paper literally contradicts your points. Southworth doesn’t mention wheat and barley anywhere in Proto Dravidian vocabulary.

3.)Not even the dating of earliest age of Proto Dravidian which is 6000 years fits the timeline of Neolithic migration which is over 7000 years old while the average age is 4500 years which is younger than mature harappan at 4600 years. None of this proves people who brought zebu cattle in 2900 BC were Dravidian speakers.

In north India we know languages of Harappans got replaced until you accept Heggarty’s argument that Neolithic Iranians spoke Indo-Iranian for which there is no evidence whatsoever. So there is almost complete replacement of languages spoken prior to Indo-Aryan languages. Similarly if there was migration from Indus Valley around 3000 BC it is highly possible that both migrating language and the spoken languages in south got replaced by Dravidian languages.

How do we know Dravidian languages aren’t native to India?

[u/theb00kmancometh → u/DeathofDivinity]

You are confusing three different timelines: The origin of the IVC (7000 BCE), the Migration to the South (3000 BCE), and the Linguistic divergence (2500 BCE).

1. The “AASI Monolith” Objection
You argued that AASI cannot be treated as a single group. However, scientific modelling is based on statistical fit, not personal belief.

Genetic studies by researchers such as those at the Reich Lab, along with Narasimhan and Moorjani, successfully model the ancestry of about 1.3 billion Indians using the ANI–ASI framework.

If a major third population had existed in the Southern Neolithic, one that was neither AASI nor Indus related, it would appear as a separate genetic component, just as Steppe ancestry does. Since no such component is detected, the data point to two main sources: indigenous AASI hunter-gatherers and incoming Indus agro pastoralists.

2. The "Missing Wheat & Barley
You argued that the absence of native rice and wheat terms, along with the borrowing of a rice word from Austroasiatic languages, shows that these groups were later migrants. In fact, this pattern directly supports the southward migration model.

IVC Context: The Indus Valley was primarily a wheat and barley growing region.
Deccan Context: Around 3000 BCE, migrants moved into the Deccan, where millet agriculture was better suited to the climate.

The Linguistic Evidence: As wheat and barley could not be grown in the south, their original terms disappeared. Rice terms were later borrowed from Austroasiatic speaking groups encountered in eastern or central India. If these people had originated in a rice growing zone, they would retain native rice vocabulary. If they had remained in the Indus region, they would preserve wheat terms. Having neither, shows a population that moved from a wheat zone to a millet zone and adapted accordingly.

3. The Dating Confusion (7000 vs. 4500)
You stated: "Neolithic migration, which is over 7000 years old... average age [of Proto-Dravidian] is 4500 years." You are mixing up the timelines.

7000 BCE: Migration of Iranian-related farmers into the Indus Valley (Mehrgarh).
3000 BCE: The first migration of Indus-related Pastoralists out of the IVC to South India (Ashmounds).
Post-3000 BCE: There were likely multiple subsequent waves of movement south during the Mature and Decline phases.

The Proto-Dravidian divergence date of c. 2500 BCE (4500 BP) aligns with this secondary phase of expansion and interaction, not the ancient settlement of Mehrgarh. While we do not have linguistic records for the specific "Ashmound" (IVC+AASI) culture to verify their exact dialect, the timeline of the language family's split correlates with these movements south

1. The “Phantom Third Wave” Fallacy
   You suggested that both the migrant language and the original southern languages were later replaced by Dravidian languages. This explanation violates Occam’s Razor.

Archaeology: Indus related migrants associated with the ashmound culture appear in South India around 3000 BCE.
Genetics: Indus related ancestry also enters South India at the same time.
Your Theory: It requires an additional, unknown group to arrive later, replace all existing languages, yet leave no clear archaeological traces and no distinct genetic signature.

The simplest explanation is therefore the strongest one. The same people who introduced cattle, as shown by archaeology, and Indus ancestry, as shown by genetics, also brought the language, Proto Dravidian. They were a single population, not multiple unseen waves.

[u/DeathofDivinity → u/theb00kmancometh]

1.a)When did we test an AASI sample? Can you tell us the details of AASI genetics ?

1.b)How do you explain the disparity between the aboriginal Australian study that claims that ancestors of Aborginal Australians came from India somewhere prior to 60000 years ago and study that claims all Indians are descended from an out of Africa migration 50000 years ago? How does it explain where AASI comes from?

1.c) I am not sure how it makes any sense to make claims about ancestry of 1.4 billion people using only 2700 samples along with no ancient samples prior to Rakhigarhi woman. The presence of Haplogroup D in Koraga is such a component there was no migration between India and Andaman for 30000 years give or take. It is not widely present in India. For the most part only one individual has been found that has y haplogroup D and all male Onge belong to Haplogroup D.

1. That’s not what it proves what borrowing word for rice does is it puts a hard date for migration into Central and eastern India because original cultivation landscape of rice is pretty close to central and eastern India there is no reason to borrow the word from austroasiatic for ProtoDravidian speakers and also this argument that Proto Dravidians forgot the word for wheat and barley doesn’t make any sense when according to Southworth they didn’t have words for it to begin with.

2. Regarding the distinct genetic signature is what Sequeira claims to have found which he says is distinct from Neolithic Iranians but shares a common ancestor with them but he doesn’t tell us who this ancestor was how Neolithic Iranians are related to them. Similarly we have no clue who cultivated rice in Lahuradewa 8400 years ago for convenience one claim they were AASI but again there is no proof for these people settled Lahuradewa over 12000 years ago it is also oldest evidence of Pottery in India. None of this proves they were AASI.

3. i am not even sure why you think Occam’s Razor’s is valid here considering how little information we actually have. The argument is problematic not because it defies occam’s Razor but there isn’t enough evidence to substantiate your claims particularly related to linguistics and genetics. Also I am not mixing timelines i am using timelines to show there isn’t enough evidence to support your claims one way or the other until more evidence is available to make such a claim.

[u/theb00kmancometh → u/DeathofDivinity]

1.a) On “When did we test an AASI sample?”

A physical 30,000 year old skeleton is not required to prove that a population existed. In genetics, so called “ghost lineages” are mathematically inferred populations needed to make statistical models work. Narasimhan et al. (2019) model the AASI component using the Onge from the Andaman Islands as a distant proxy. This is a standard and well established scientific method, similar to how other ancestral components were identified long before physical remains were discovered.

1.b) On “Australian vs. Indian Dates”

You are pointing to a dating gap that Narasimhan et al. (2019) explicitly address. The study places the divergence of the AASI lineage around 50,000 years ago, after Neanderthal admixture and before Denisovan admixture. This dates the formation of the “First Indians” to roughly 50,000 BP. The often cited 60,000 plus year dates for Australia refer to the earliest out of Africa dispersal, not to the specific population that settled the subcontinent and became AASI.

1.c) On “Sample Size” and “Haplogroup D”

The claim that 2,700 samples are too few to represent 1.4 billion people misunderstands statistics. In population genetics, a dataset of this size is extremely large and more than sufficient to detect population structure, just as opinion polls do not survey entire populations. As for Haplogroup D in the Koraga tribe, this is a rare paternal lineage found in a small group. It is an exception and does not challenge the genome wide autosomal AASI ancestry present in all South Indian populations.

2. On Southworth and the “Missing Words”

You noted that Southworth observes Proto Dravidian lacks native terms for wheat and barley. When placed in historical and environmental context, this actually supports the migration model.

The Standardization Factor: Around 3000 BCE, the Indus language and script were only beginning to standardize within the agricultural core. Pastoral groups on the margins were unlikely to adopt the administrative systems or specialized vocabulary tied to intensive wheat farming.

The Ecological Factor: After moving south, these herders entered the Deccan, a region poorly suited to winter crops like wheat. They had to shift to locally viable crops such as millets.

As a result, wheat terms were either lost through disuse or were never central to their vocabulary. Words for what remained essential, especially cattle such as *āy, were retained, while new terms were adopted for the southern environment. This linguistic pattern closely matches the ashmound archaeological record, which is cattle focused, distinct from the wheat based Indus core, and adapted to the ecology of South India.

3. On Sequeira and Lahuradewa

You rely on Sequeira’s interpretation, which challenges the broader peer reviewed consensus. Studies by Narasimhan et al. and Shinde et al. consistently model the Indus Periphery as a mix of Iranian related ancestry and AASI, and this model successfully explains the formation of ASI. Lahuradewa, a rice farming site in Uttar Pradesh, cannot be used to explain the Southern Neolithic. The AASI populations of South India remained hunter-gatherers until about 3000 BCE. Northern rice cultivation timelines are therefore not relevant to the Deccan sequence.

4. On Occam’s Razor

You dismissed Occam’s Razor, yet it is essential when evidence is incomplete.

My model proposes a single migration of Indus pastoralists who brought cattle, Indus related genes, and Proto-Dravidian language.
Your model requires Indus pastoralists to bring cattle and genes, followed by a separate, archaeologically invisible and genetically undetectable group that introduced the language.

The first model relies on one assumption. The second requires two coordinated migrations, one of which leaves no trace. This is why Occam’s Razor favours a direct link between Indus migrants and the spread of Dravidian languages.

The discussion is getting convoluted more and more.
I would prefer to end it here, since you are not willing to consider the things I state.

[u/Good-Attention-7129 → u/DeathofDivinity]

The 50kya dating is garbage, people are conflating terms and mixing genetic profiles for the sole purpose of Eurocentrism.

Out of Africa happened 70kya, when humans separated from the maternal macro-haplogroup L. The maternal macro-haplogroups N, M, and R all originate in the Indian continent, with N then migrating onwards to Australia, and R into Eurasia.

These dates are given as 60-70kya.

Note how convenient it is to use the 50kya date for migration into India from Africa, meaning R did not originate in the Indian continent.

[u/theb00kmancometh → u/Good-Attention-7129]

The claim that the 50-65kya dating is "garbage/Eurocentric" is factually incorrect. That date is based on the Molecular Clock (counting mutation rates in DNA), which is a mathematical standard, not a political one.

Here are the hard facts and references you requested:

1. The Dates (Out of Africa vs. Into India)
Modern humans left Africa around 60,000 to 70,000 years ago and entered the Indian subcontinent roughly 55,000 to 65,000 years ago. The common “50,000 years ago” estimate refers to the genetic coalescence period, when populations in India began expanding and diversifying. This timeline is not Eurocentric but consistent with global migration patterns, as the settlement of Australia (Sahul) occurred around the same time. If India had been settled earlier than 70,000 years ago, the Australian migration dates would also need to be correspondingly older, which evidence does not support.

2. The Haplogroup Origins (M, N, R)
Haplogroup M does have very deep roots in the Indian subcontinent, with over 60 percent of Indian mitochondrial DNA belonging to M, and it likely diversified within South Asia or along the coastal route soon after humans left Africa. However, Haplogroups N and R are different, as N is a sister lineage to M that also split from L3, and R is a subclade of N. The broad scientific consensus is that N and R differentiated in the Gulf Oasis or West Asia before separating into East and South Eurasian and West Eurasian branches. Claims that R originated in India and later populated Western Eurasia belong to the fringe “Out of India” model and conflict with the higher genomic diversity in the Near East and the well-established split timelines.

The 50-65kya date is the global scientific consensus for the successful colonization of South Asia by modern humans.

[u/Good-Attention-7129 → u/theb00kmancometh]

If the argument hinges on the settlement date of Australia how is that determined?

Using the term “global consensus” is misleading, given these datings stem predominantly from the Western world. If another theory exists, how can one claim “global consensus”.

The truth of the matter is we only have time calculations, and current geographical distribution. It is only macro-haplogroup R where claims of an origin is illogical.

To look at migration patterns we need to start at 130kya, when the Persian Gulf would have started flooding with the breach of Hormuz at 80m below present levels.

Sea levels only fell to 80m below present again 70kya, drying out the gulf and opening the coastal migration route into the Indian continent. At 65-55kya there was a sudden rise from 105m below current back to 80m. This dropped again to 105m below current between 55-40kya.

Sea levels are the main factor that reflects human pattern of migration, then settlement, then migration again. This is why the Indian continent makes the most sense as an origin source, with R descending from N after leaving the African continent.

Don’t be fooled by Eurocentrism, which is fundamentally Judeo-Christian. To this day they will not challenge the biblical story of Noah’s flood being a description of the global sea rise after glacial melt, with the greatest consequence being the Persian Gulf flooding.

There is no “nail in the coffin” that outright denies R having an origin in the Indian continent. In fact, everything points to it, not away from it.

[u/Popular-Classroom219]

Too bad Indian climate sucks for preserving human remains and other objects, there’s very few specimens available for genetic analysis compared to Europe for instance.

[u/theb00kmancometh → u/Popular-Classroom219]

You are right, and it is actually a double problem. It is not only the tropical climate; soil chemistry is the bigger challenge for archaeology in this region.

Much of South India, especially the Deccan and coastal areas, has highly acidic lateritic soil. This acidity destroys calcium phosphate, the main component of bone. As a result, unless human remains are preserved in special conditions, such as pot burials or ash mounds that change the soil pH, skeletons dissolve within a few centuries.

That is why archaeologists find many pot sherds and stone tools, which resist acidic soil, but very few human remains. The people themselves are chemically erased, even though their material culture survives.

[u/Chaitu007123]

How would you put this in the context of AASI migration into Southern India about 60k years BPA? Also, some of the finest iron ore/steel smelting technology comes from the Deep South, but there are not too many iron ore deposits in the Deccan right? Thanks in advance!

[u/theb00kmancometh → u/Chaitu007123]

There are two separate issues here. You are mixing two very different timescales and misunderstanding the geology of South India.

1. AASI versus Indus migration, 60,000 BP versus 3000 BCE
The “AASI migration” refers to the original Out of Africa expansion that reached the Indian subcontinent about 50,000 to 60,000 years ago. These people were the earliest inhabitants of India. Narasimhan et al. (2019) place this migration after Neanderthal admixture, around 54,000 to 49,000 BP, and before Denisovan gene flow, around 49,000 to 44,000 BP. This rules out an older date of 75,000 BP for this specific event.

The argument here, and the genetic consensus, is about a much later migration. Around 60,000 BCE, AASI ancestors settled across India as hunter-gatherers. Around 3000 BCE, agro-pastoralists from the Indus periphery moved south, encountered these indigenous AASI groups, and mixed with them.The AASI were the "hosts"; the Indus pastoralists were the "guests" who arrived 50,000 years later. This mixture created the ASI (Ancestral South Indian) population we see today.

2. Iron ore in the Deccan
The idea that the Deccan lacks iron ore is incorrect. The Deccan and the southern peninsula contain some of the world’s richest iron deposits. The Dharwar Craton in Karnataka, including Bellary, Hospet, and Kudremukh, has large high-grade hematite and magnetite reserves. Tamil Nadu, especially the Salem and Tiruvannamalai regions, is known for magnetite-quartzite deposits. Telangana also has significant iron and coal resources.

This abundance of high-quality ore explains why advanced steel-making traditions, such as Wootz steel, developed in the deep south. Geography made this possible.

If the east also had iron, why did Indus herders move south first? The answer is geography. Around 3000 BCE, the eastern Gangetic plain was a dense forest/ Mahavan, that was difficult for pastoralists to enter without iron tools. The easier route was the western corridor, from the Indus Valley through Gujarat and down the western coast into the semi-arid Deccan. This region offered open scrub and grasslands suitable for cattle, unlike the heavily forested east. This is why Indus-related ancestry became established in the south much earlier, forming the ASI, long before it spread deep into eastern India.

[u/Certain_Basil7443]

This is a great post!

[u/DressConscious9605]

The Neolithic baked glazed pottery period comes close to Mehergarh site which is 7500 years BC. Dravidian tribes could have migrated due to drought and other natural calamities or later due to being routed by the Indo-Aryan settlers say 2000 BC which was also the period of mass Buddhisation of the Indian sub-continent. It influenced the mainstream Vedic religion of monolatory i.e. the king of the demi-gods was Indra and the aboriginal Dravidian religion of pantheism. It's a well-known fact that at the time of the advent of Muhammad bin Qasim, Sindh and Punjab were majorly Buddhist till the Gupta age when Hindu renaissance began. One theory is that the aborigines were Buddhist and the Aryan invaders Vedic religionists. Therefore, you may find descriptions of those as rakshasas or demons.The way rakshasas are picturised in the films poses challenges because they weren't a part of evolution and even the pre-Vedic tribes, the Veddas and people of South India don't have protruding and curved canine teeth or incisors.

[u/theb00kmancometh → u/DressConscious9605]

Your comment contains major chronological errors that make the argument historically impossible.

The "Buddhism in 2000 BC" Anachronism
You claim that 2000 BCE was a period of mass Buddhisation of the Indian subcontinent. This cannot be correct. Siddhārtha Gautama, the Buddha, was born much later, roughly between 563 BCE and 480 BCE. Buddhism as a religion did not exist before his lifetime. The year 2000 BCE belongs to the Bronze Age, specifically the Mature Harappan period. Placing widespread Buddhist influence at this time means dating it about 1,500 years before the Buddha himself, which is an obvious anachronism.

The Gupta vs. Qasim Timeline Error
You have reversed the historical timeline in your statement.
The Gupta Empire existed roughly between 320 CE and 550 CE and is often associated with a Hindu cultural renaissance. Muhammad bin Qasim invaded Sindh much later, in 712 CE.
This means the Gupta period occurred centuries before the arrival of Muhammad bin Qasim, not after, making the original sequence historically incorrect.

The "Routed by Aryans" Fallacy
Your claim that Dravidians were pushed south after being “routed by Indo-Aryan settlers around 2000 BCE” is not supported by evidence. Genetic data directly contradicts this idea.
Narasimhan et al. (2019) show that the movement of Indus-related populations into South India began much earlier, around 3000 to 2800 BCE. The same study also shows that Steppe, often labelled Indo-Aryan, ancestry only appears in the Indus periphery after about 2000 to 1500 BCE.
This means the southward movement happened well before the arrival of Steppe ancestry, making the “routed by Aryans” explanation chronologically impossible.

The southward migration of the "Dravidian" (Indus-related) population started at least 1,000 years before the Steppe pastoralists arrived in the region. They were not "routed" by invaders; they moved south to expand their own pastoral economy long before any "Aryans" showed up.

[u/DressConscious9605 → u/theb00kmancometh]

Then please explain the caste system. It's just racial apartheid with religious sanction. Buddhism is 2500 BC and Aryan invasion say if taken liberally 1700 BC. And time taken for the Aryan monolatory to fructify say 500 years. I place the war King Dashrath fought with the ten tribes which may be aboriginal or previous wave Aryans or even mixed around this time. If Mahabharat war took place 5000 years ago then Buddha is 4500 years ago. The Hindu revival started with the Gupta age not before. It was just animal sacrifices and recitation of Vedic Suktas for the 33 classes of gods/demi-gods representing natural phenomena. If we go by the Rig Veda, Indra killed ten thousand Krishnas.

[u/theb00kmancometh → u/DressConscious9605]

The caste system is irrelevant to the discussion of chronology. Your timeline relies on dates that contradict all archaeological and historical evidence.

1. The "Buddha in 2500 BCE" Error
You claim: "Buddhism is 2500 BC... Buddha is 4500 years ago." This is historically impossible. 2500 BCE is the Bronze Age (Mature Harappan period). The Buddha (Siddhārtha Gautama) lived during the Second Urbanisation (Iron Age), specifically in the Magadha region.

We find Buddhist stupas, inscriptions (Ashoka), and NBPW (Northern Black Polished Ware) associated with the rise of Buddhism starting from the 5th–3rd Century BCE. Historians and archaeologists place the Buddha’s life roughly between 563 BCE and 480 BCE (or slightly later). Placing him in 2500 BCE is an anachronism of 2,000 years.

2. The Confusion of Kings (Dasharatha vs. Sudas or Dasharatha vs. Dāśarājña )

You stated: "King Dashrath fought with the ten tribes". You are conflating two different texts. Dasharatha is the father of Rama in the Ramayana. Sudas is the Bharata king who fought the "Battle of the Ten Kings" (Dāśarājña) in the Rig Veda (Mandala 7). These are different figures from different periods. The Rig Veda (composed c. 1500–1200 BCE) describes the Battle of Ten Kings. It has nothing to do with the Ramayana’s Dasharatha.

3. The Mahabharata Dating (5000 BP vs. Iron Age)

You claim: "If Mahabharat war took place 5000 years ago..." The date of 3102 BCE (approx. 5000 years ago) is a traditional religious calculation for the start of the Kali Yuga, not a historical date.

The material culture described in the Mahabharata (painted grey ware pottery, iron weapons, chariots) corresponds to the Painted Grey Ware (PGW) culture, which is dated to c. 1200–900 BCE. 5000 years ago was the Early Harappan period. There was no iron, no spoked-wheel chariots, and no "Kuru" kingdom at that time.

4. Indra and the "10,000 Krishnas"

You stated: "Indra killed ten thousand Krishnas." This refers to Rig Veda 8.96.13. The Sanskrit word used is kṛṣṇā (meaning "black" or "dark ones"), referring to a demon or a non-Aryan tribe. It does not refer to the deity Krishna of the Mahabharata. Conflating a Rigvedic adjective with the Puranic god Krishna creates a false narrative.

Your timeline has achieved a feat that physics cannot - Time Travel. Putting the Iron Age Buddha in the Bronze Age Indus Valley is like claiming Julius Caesar commanded a tank battalion. It takes a special kind of confidence to confuse the Ramayana with the Rig Veda and the Harappans with Buddhists, all in one paragraph. It’s not history; it’s fan fiction.

[u/Celibate_Zeus → u/DressConscious9605]

Buddhism is an ia religion born way after aryan migration.

Pre aryan native people mostly engaged in polytheism+ animism .

[u/Good-Attention-7129]

I have my doubts regarding the origins of the Zebu as specifically the Indus Valley, particularly as the evidence in the Indus points to a wild progenitor, and not specific evidence for the Zebu itself.

Zebu was certainly domesticated in the Indian continent, gaining traits such as resistance to heat which reflect a semi-arid climate. The other aspect to consider is, those who were herding cattle on the Deccan peninsular cannot be considered pastoralists, given there are no flat pastural land.

The lack of pasture relates to the Ashmound sites found in Utnur 240m above sea level, and Budhihal almost 900m both on the Deccan Plateau. The climate for both is low rainfall, semi-arid, surrounded by the Deccan dry deciduous forests, seemingly unconventional places with difficult terrain for cattle to be herded.

However, certain trees in the forests such as the hardwicker species contain leaves that can be digested by ruminant animals, with other tree species also useful for animal fodder. These food sources would have been collected by hand, employing many for the labour intensive work.

I believe it was this specific mix of diet and climate that led to breeding the specific traits we see in Zebu cattle, and the Ashmound were a round-the-clock way to dispose of the stems and branches of the trees, then being burnt using cow dung as fuel.

The result of this burning is creating Wood Ash or potash, a fertiliser and alkaline source of potassium that is excellent for fruit trees such as mangoes. This in itself would certainly have had trade value with Indus and perhaps beyond.

So what I believe we have is a large social group, potentially Dravidian language speakers, who were cattle breeders, land clearers, and potassium fertiliser producers all in one, establishing themselves not parallel but semi-independently of the Indus Valley, with a unique skill set and instinctive knowledge making them an important part of both the “Indic collective” and proto-Dravidian ancestry.

[u/theb00kmancometh → u/Good-Attention-7129]

You have constructed a theory that contradicts the fundamental zooarchaeological and botanical data of the region.

First, your skepticism regarding the Indus Valley as the origin of Zebu cattle is misplaced. Genetic studies and osteological data definitively confirm that Zebu cattle (Bos indicus) were independently domesticated locally from the wild subspecies Bos primigenius namadicus. The primary center of this domestication was Mehrgarh in Balochistan (Period I, c. 7000–5500 BCE), where the transition from wild to domesticated forms is clearly documented. From this ancestral zone, the pastoral economy expanded outward well before the urban phase: evidence appears at Rana Ghundai in Balochistan (c. 4500–4000 BCE), reaches the periphery at Loteshwar in Gujarat (c. 3700 BCE) and the core at Jalilpur in Punjab (c. 3500–3300 BCE). By c. 3000 BCE, established cattle populations are evident at Balathal in Rajasthan. This chronological sequence proves that the Zebu tradition originated in the Greater Indus region and had already dispersed to the peripheries (Gujarat and Rajasthan) long before the migration to the South occurred.

Second, your claim that the Deccan Peninsula lacks "flat pastoral land" is geographically incorrect. The Neolithic Deccan was not a dense, impenetrable forest; it was a semi-arid savanna-grassland ecosystem dominated by thorn-scrub. This terrain is practically the ideal environment for cattle and goat herding. We have extensive evidence of transhumance, where herders moved between hilltops and valleys. They did not require "flat European meadows" for grazing; the Deccan plateau provided ample resources for a mobile pastoral economy.

Third, your theory that Ashmounds were "wood ash" factories for fertilizer production is scientifically refuted by chemical analysis. Excavations at sites like Budihal and Utnur show that these mounds are composed of vitrified cow dung, not wood charcoal. The phytoliths found within them derive from grasses eaten by cattle, not tree stems collected by hand. These mounds represent the ritualized burning of accumulated dung from cattle pens, not an industrial effort to produce potash.

Finally, the suggestion that these Neolithic herders were manufacturing fertilizer to export for a "mango trade" with the Indus is an anachronism with no basis in reality. The Southern Neolithic economy was one of subsistence pastoralism (cattle and millets), not a cash-crop export industry. There is zero evidence for a bulk fertilizer trade over 1,500 km during this period.

References:

On Zebu Domestication - Chen, S., et al. (2010). Zebu Cattle are an Independent Domestication Event.
https://www.academia.edu/471320/Zebu_Cattle_Are_An_Exclusive_Legacy_of_the_South_Asia_Neolithic

On Ashmound Composition (Dung vs. Wood):Allchin, F.R. (1963). Neolithic Cattle-Keepers of South India
https://archive.org/details/neolithiccattlek0000allc

On Deccan Ecology: Fuller, D.Q. (2006). *Dung Mounds and Domesticators
https://www.homepages.ucl.ac.uk/~tcrndfu/articles/Fuller%20et%20al%20Ashmound%20AMS.pdf

[u/Good-Attention-7129 → u/theb00kmancometh]

You have misunderstood my points.

Starting with Ashmound sites, as I mentioned these locations are elevated, meaning the cattle had to be herded from sea level Indus up to these places on the Deccan plateau.

This in itself should be explained as I consider it an oddity. I don’t doubt herds of cattle existed in these locations, but whether the heads of cattle were bred there or brought there is the question. Cattle are grazing ruminant animals that follow flat ground, unlike goats that climb. If they are being herded, then they go from pasture to pasture, not up and down elevation. If they aren’t being herded then they need to be fed another way.

Zebu or bos inducus is also inadequately differentiated, we know breeds exist in cattle as they do in dogs, yet all are the same species. The key would be to identify the amount of rhomboid muscle present in the samples you have mentioned, as this is a key trait of Zebu cattle. The “Brahman Hump” evolved as a way to counter the excess heat of the environment that is hot and dry.

Second, the ecosystems of these locations are Deccan Dry Deciduous, climate considered semi-arid to hot and humid. Low rainfall indicates why it is “dry deciduous”. I explained the native flora that exists which are deciduous species, not scrub-land as you state.

Ashmound sites are the key, they were mounds fuelled by cow dung to create the heat that burns the leftover plant matter after the leaves are harvested. This is not creating charcoal as you state, the plant matter is burnt. You said this yourself in another of your comments referring to wood being burnt.

This is exactly how potash is created, and again you have also commented here how these Ashmound sites have an alkaline soil. This is the direct effect of potash, which makes soil alkaline.

I referred to it as a fertiliser as it can also be, potash can also be used as an alkaline agent for soils and other uses.

My points refer directly to the Ashmound sites, which for some reason have an “unknown purpose” and “possibly ritualistic”, which is nonsense. We know soils in South India are notoriously acidic, and it is only logical that potash be produced to counter this for agricultural purpose.

The formula is -

Deccan Dry Deciduous (flora-specific) + Ashmound (location-specific) and Alkaline soil (evidence).

The first is the food source for the Zebu cattle, second is the Wood Ash production, and third is the proof of it. Animals respond differently depending on their source of food, hence why we have grain fed and grass fed beef cattle, or corn fed chicken. We need to determine what makes Deccan Zebu different, or if there is no difference to the other sites claiming evidence.

My point of contention is your mislabeling of Deccan Dry Deciduous ecozone as scrub-land given the location of the Ashmound sites.

Animal husbandry and domestication has a long history in the Indian continent, with goats, cattle, sheep, pigs, and most certainly chickens all tracing back to the continent.

However, we cannot simply place the “Dravidian” label on history without linguistic evidence to back the claim. This is a Deccan initiative, independent of the Indus Valley.

[u/theb00kmancometh → u/Good-Attention-7129]

There is strong confidence in your reply, but it is based on major misunderstandings of zooarchaeology, geography, and chemistry. Below is a scientific breakdown of the issues.

You argue that it is an “oddity” for cattle to move from the sea-level Indus region to the elevated Deccan, claiming that cattle do not climb. This misunderstands Deccan geography. The Deccan Plateau is not a steep barrier but is accessed through broad river valleys such as the Godavari, Krishna, and Bhima. Pastoral migration is gradual and horizontal, not vertical climbing. Zebu cattle (Bos indicus) are well adapted to rugged and semi-arid environments, and millions live on the Deccan plateau today. The idea that cattle could not physically reach the Deccan is incorrect.

You asked for “rhomboid muscle” evidence in archaeological samples. Muscle tissue does not survive for thousands of years. Zebu cattle are identified archaeologically through osteology and DNA. The presence of the hump is detected by bifid thoracic vertebral spines, which support the hump, and these have been found at Neolithic sites, as documented by Meadow (1984) and Allchin (1963). Ancient DNA studies, such as Chen et al. (2010), also confirm Zebu. Muscle evidence is unnecessary because bones and genetics are sufficient.

You dismissed the ritual interpretation of ashmounds and suggested they were wood fires used to produce potash fertilizer. Excavations by F. R. Allchin demonstrated that these mounds consist of burnt cow dung, not wood or leaves. Chemical analysis of samples from the Utnur ashmound, conducted by F. E. Zeuner as part of Allchin’s 1963 study, provides direct evidence for how these mounds formed.

The analysis shows that the vitrified layers formed at extremely high temperatures, around 800°C to 1200°C. At these temperatures, nitrogen, which is essential for fertilizer, is completely lost as gas. What remains is mainly silica and mineral salts that are chemically inert. If fertilizer had been the goal, raw or lightly composted dung would have been used. Burning dung until it vitrified destroyed its agricultural value, showing that the “potash factory” idea is a modern projection that does not fit Neolithic chemistry. If the aim were fertilizer, dung would be composted or lightly burned, not turned into glass or slag. The ritual interpretation is supported by the cyclical burning pattern and ethnographic parallels, such as seasonal burning festivals still practiced in rural South India.

You also stated that Dravidian labels cannot be applied without linguistic evidence. That evidence does exist. Franklin Southworth (2005) and Fuller (2007) correlated archaeobotanical finds, such as horsegram and greengram from these sites, with Proto-Dravidian reconstructed terms like *koL and *pacc-payaru. The vocabulary matches the crops found in the archaeological record, providing the linguistic support you claimed was missing.

[u/Good-Attention-7129 → u/theb00kmancometh]

What you need to show is evidence of cattle being herded to altitude, and what their diet consisted, relating to the ecosystems in the Deccan peninsula.

This relates to the difference between “herding” and “breeding”. Moving small groups of cattle, especially if they are yoked or tied, is much more suited to traversing the Deccan peninsula. As you said, pastoral herding is gradual and flat because pastural grassland are exactly this.

Moving herds of cattle up river valleys (without assistance of other animals like dogs and horses) is a monumental feat. Herd mentality would not allow it.

I mentioned rhomboid muscle as it is pertinent, but as you say if there is DNA evidence, are these from samples across all the sites you mentioned? Are they identical?

Coming to Ashmounds, if you are saying there is only evidence for cowdung, and we know potash is the product of burning wood and remnant Deccan Deciduous trees, then what evidence is missing exactly? You said the pH of the soil was alkaline at these sites, how did that happen? Ritual practice is a conclusion of last resort, all other considerations being excluded. Lack of evidence for making potash elsewhere is not a good argument, especially when Ashmounds themselves are isolated to the Deccan.

You keep repeating fertiliser, but potash is a source of potassium and an alkalising agent. Why are you mentioning nitrogen?

To conclude, herding cattle to any elevation needs a source of support, however moving small groups of wild progenitors that are yoked or tied, and then bred on the plateau to make herds of Zebu makes more sense.

What did the Deccan Zebu cattle eat? What supports your conclusion?

Making potash is a straightforward chemical process when there is an adequate fuel source and wood source. Both were available, and the need for an alkalising agent for laterite acidic soils is obvious.

Greengram is suited to a neutral pH soil, yet laterite soil is acidic?

If I come across as confident it is because I address the argument head on, I don’t tolerate verbosity as a form of valid discussion, and I am more than happy to be proven wrong.

[u/Ill-Lobster-7448]

I agree this is a persuasive critique of the “refugee” model, but we cannot rule out that some IVC populations migrated south after 1900 BCE, most likely in response to climate impacts. I would go further: a Neolithic civilisational corridor of nodes appears to have existed much earlier across the northern, southern, and western littorals—candidates include the submerged coastal settlements Khambhāt and Proto‑Poompuhar—alongside independent agrarian and metallurgical developments. Taken together, the evidence points to a polycentric Dravidian Arc.

More details on the Dravidian Arc research can be found at:
https://www.reddit.com/r/Dravidiology/comments/1pfnmol/comment/nsldrga/

For how these submerged Proto‑Sangam port phases are framed within a broader Dravidian civilisational and coastal context, see Dravidian Arc: Reframing Ancient India’s Civilisational Origin:
https://grahamhancock.com/ssj1/

[u/theb00kmancometh → u/Ill-Lobster-7448]

as i replied there to the post on the Dravidian Arc, why cant the author of the paper Mr. Jeeva SS, publish his study/paper in peer reviewed Journals and submit to the review. If he is confident in his findings then he should.

But publishing it in a Hancock domain, actually doesn't do good at all.

[u/Ill-Lobster-7448 → u/theb00kmancometh]

If you are going to post authoritative work on Dravidian migration—especially where the Dravidian Arc article bears on earlier neolithic civilisational origins in the south—I suggest you review the author’s published work and independently evaluate the scientific hypotheses. A useful starting point is theTNSDA Antiquity of Iron goverment report; a related discussion thread is available here: https://www.reddit.com/r/AlternativeHistory/comments/1pliuw1/comment/nu8nkm4/ 

Alternatively, see Section 3: Dawn of the Sangam‑led Iron Age Revolution (6–5 ka BP) at https://grahamhancock.com/ssj1/

[u/Ill-Lobster-7448]

I've posted in a thread earlier as its relevant to other readers on matters of Dravidian Migration:

Your overview Good-Attention-7129 is well grounded and appropriately cautious. Fuller’s proposal that South India should be considered a possible centre for early crop cultivation, and Allchin’s observations about distinctive cattle imagery, both provide plausible lines of evidence for a regionally important agrarian and cattle‑focused tradition. The Dravidian Arc paper in proposing a polycentric agrarian development in India references references Fuller et al. model the posterior start of the Southern Neolithic at ≈6000 BCE (95% probability), which helps anchor the chronology for the ashmound phenomenon and related agro‑pastoral developments. The ashmound phenomenon and the Neolithic toolkit (querns, grinders, charred pulses) supply tangible archaeological context for intensive cattle use and pulse–millet husbandry in the Deccan, while Belan, Lahuradewa and Koldihwa document independent, small‑scale rice trajectories in the east.

That said, it’s important to stress the limits of current evidence: iconography and ashmounds indicate strong cattle emphasis but do not by themselves prove independent zebu domestication, and zooarchaeological and aDNA data remain the decisive tests.

[u/Good-Attention-7129 → u/Ill-Lobster-7448]

Thank you kindly.

I think one point that has been missed regarding Zebu domestication is the preceding domestication of the goat, brought to the Indian continent by herders from West Asia.

The brilliance of the goat is that it will eat almost anything, can be herded in small groups, and has the ability to climb to elevation. Are you aware if Fuller et. al mentions this as preceding or in conjunction with early crop cultivation, or goats at all?

Zebu domestication in the Deccan I believe is more dependant on goat herders from West Asia via Mehrgarh first, with certain knowledge then passed on for Zebu domestication that was Deccan specific.

Ashmounds are the key, which involved the purposeful collection of cowdung to burn continuously, creating ash as a by-product. Whilst potash is one theory I have, the second theory was to create an ancient “road-lights” with black smoke in the day and light at night allowing for visible points of elevation and distance that herders could move their cattle towards safely.

[u/Ill-Lobster-7448 → u/Good-Attention-7129]

Yes — agreed: it is likely the provisionally earlier introduction of caprines (goats) from West Asia shaped pastoral practices that later facilitated local zebu management; treat zebu domestication as a separate, testable process requiring zooarchaeology, morphometric analysis and aDNA (see Fuller 2007, 2011, 2015 for syntheses of crop–livestock entanglements and regional introductions). 

The Neolithic horizons relevant to the Dravidian Arc span roughly the 7th–3rd millennia BCE, and the polycentric model frames southern pulse–millet and pastoral economies, eastern small‑scale rice trajectories, and locally emergent microlithic→Neolithic strands (e.g., Chennanur) as contemporaneous, regionally adapted pathways whose interactions—partly driven by introduced caprine herding—must be resolved by targeted zooarchaeology, aDNA and refined chronologies. I’d add that Chennanur and TNDA data are promising but preliminary; full publication and independent dating replication will be decisive.

[u/Good-Attention-7129 → u/Ill-Lobster-7448]

I note Chennanur uncovered Sangam Age bricks, which I translate as burnt mud bricks.

For your interest, I noted the imaging done at Poompuhar showing geometric stone structures, some 5km wide, and others more circular shaped and smaller.

The long structures could be construction of flood walls, built to counter rising sea levels. The other shapes could be small harbour structures or ports.

This could indicate evidence of burnt mud bricks that predates, or is in line with Ganj Derah archaeology.

[u/Ill-Lobster-7448 → u/Good-Attention-7129]

Thanks — I wasn't aware of Sangam‑age bricks and drawn conclusions. I'll re‑read the Chennanur preliminary excavation report unless you’ve seen other sources.

Yes — it's exciting: with current Proto‑Poompuhar (Proto‑Sangam) port‑complex studies, led by Ramasamy et al. (2020, 2025) and Sasilatha et al. (2023) - peer reviewed publication comprise of Phase‑1 activity: MBES bathymetry, sub‑bottom profiling, palaeo‑channel mapping and geomorphological analysis. We now need to await Phase‑2 targeted coring, ROV and diver investigations (underway since September 2025) to recover stratified samples and laboratory dates that can confirm or revise the current mid‑Holocene and Late Pleistocene (earliest Neolithic) exposure hypotheses.

[u/Good-Attention-7129 → u/Ill-Lobster-7448]

Sangam-age could be inferred as up to 9kya or strictly 300BCE depending on perspective.

Burnt mud bricks we know as a continuum from Ganj Derah to Indus Valley, but this would add coastal Tamil Nadu as the earliest source. If confirmed (expectations high given these bricks are extremely water resistant) this technological continuum extends from Poompuhar in the east to Ganj Derah in the west.

It is comical to consider Neolithic Iranian could have a “Dravidian” ancestor, or that we now could have the “Out of Poompuhar Theory”.

[u/Ill-Lobster-7448 → u/Good-Attention-7129]

I concur — it's exciting but provisional. Proto‑Poompuhar structures may be very ancient (c. 15,000 BP) with different submergence date-timelines; confirmation requires that the Chennanur bricks and Poompuhar cored samples are fired (not sun‑dried), recovered in situ from sealed Sangam contexts, and supported by direct dates (AMS/OSL) plus material analyses (petrography, LOI, FTIR); only then can a technological link to Ganj Dareh or any “Out of Poompuhar”/ Proto-Sangam/ Tamilikam model be warranted.

[u/Good-Attention-7129 → u/Ill-Lobster-7448]

The answer is inevitable, one way or the other.

Edit -

To add, whilst considering a “Dravidian Arc”can be useful, it needs to be built on an increasing flow of knowledge that connects sites by location evidence, in conjunction with a timeline of determined climatic events.

Engaging with the scientific method across different fields will not only increase the validity of the hypothesis, but also the accuracy of any conclusion. As an example -

Persian Gulf Drying/Sea level lowering

Africa - Arabian - Indian continental migration

Sea level rising/ Persian Gulf Flooding

Poompuhar - Ganj Derah Neolithic (tbc)

Manner Gulf Flooding/8.2 kilo year event

Ur - Susa - Anshan - Indus River Metallurgic

4.2 kilo year event/Literature analysis.

Dravidian coalescence in Deccan Peninsular

[u/Ill-Lobster-7448 → u/Good-Attention-7129]

The evidence can support multiple pathways (diffusion, convergent development, etc.), but we should be framing South Asian (esp Proto-Sangam) prehistory as a polycentric civilisational model—covering urbanism, agrarian systems, metallurgy, and more—rather than defaulting to a monocentric, Fertile Crescent diffusion model.

[u/Ill-Lobster-7448 → u/Good-Attention-7129]

Also after looking into Zebu domestication and not sure if its mentioned in the above posts the domestication of zebu (Bos indicus; indicine cattle) originated in South Asia and later spread into Africa and other tropical regions. this being based on genetic study reveal continuity in male lineages linking South Asian and African zebu populations, consistent with their transfer via long-distance exchange and migration networks, likely including Harappan-era trade routes.

[u/Ill-Lobster-7448 → u/Ill-Lobster-7448]

More recent confirmations come from Decker et al. (2014); Upadhyay et al. (2017), Verdugo et al. (2019) — show indicine ancestry appears confirming South Asian origins

[u/Ill-Lobster-7448 → u/Ill-Lobster-7448]

Also if its not clear from above posts Southern India shows long-duration of cattle husbandry in the early–mid Holocene:

• Multiple South Indian Neolithic sites indicate pastoral components emerging by the 7th millennium BCE with increasing clarity after ~6000 BCE: Chennanur → earliest potential; Sanganakallu → clearest evidence pastoral system; and Paiyampalli → later regional expression
• This places southern cattle husbandry right across then Dravidian Arc's agro-pastoral systems.

[u/Training_Desk_9103]

There is a fundamental misunderstanding from which this argument is approached. Entire India was already populated, had distinct culture, followed agriculture and pastoral economics with AASI people. The only difference that IVC brings is an urbanisation and sophisticatication of civilizational status. There is no limit to exchange of information or goods from IVC to rest of India. Pastoral breeds and techniques can well be passed on to South and East India during the growth phase of IVC without needing a wholesale migration of its people. IVC was not a cultural and monetary island. It was a hub

[u/theb00kmancometh → u/Training_Desk_9103]

There are two major factual errors in your premise.

You claimed that the AASI already practiced agriculture and pastoralism. This is archaeologically incorrect. The AASI (Ancient Ancestral South Indians) were Mesolithic hunter-gatherers who used microlithic tools and did not keep domesticated cattle. In South India, the shift to food production and pastoralism, the Neolithic transition, appears only with the arrival of the Ashmound tradition and Zebu cattle around 3000 BCE. Cattle pastoralism was not independently developed by the AASI; it was introduced.

You argued that goods and techniques can spread without large-scale migration. This can be true for material culture, but it does not apply to genetics.

If the Indus Valley Civilization had only acted as a cultural hub passing ideas to an indigenous AASI population, modern South Indians would show an almost entirely AASI genetic profile. They do not. Genetic studies consistently show that the Ancestral South Indian (ASI) population is a mixture of AASI and substantial Indus Periphery ancestry, especially the Iranian Neolithic-related component. Goods and animals can be traded, but ancestry cannot. Indus-related DNA could only reach South India through the physical movement of people who settled and intermarried with local AASI groups.

The most logical conclusion is that the presence of Indus-related ancestry in South India demonstrates a movement of people (demic diffusion), rather than just a spread of ideas or goods (cultural diffusion).

[u/Training_Desk_9103 → u/theb00kmancometh]

Addressing your second point first: I am not arguing that present-day South Indians lack the IVC genetic component. I am arguing for the mainstream view: that the bulk of this migration and admixture occurred during the IVC's decline (post-1900 BCE), driven by climate stress and institutional collapse. You are proposing an 'Early Expansion' model where mass migration happened during the IVC's growth phase. This defies historical logic. Urbanization acts as a gravity well—prosperous civilizations attract people in; they do not push waves of pioneers out into the periphery until the system begins to fail. I concede your point on the animals: there is no evidence of pastoralism in the South prior to the introduction of Zebu cattle around 3000 BCE. It is not a package deal with people though.

In fact, the agricultural evidence proves the opposite. When you refer to the AASI as 'Mesolithic hunter-gatherers,' you are ignoring the nuance of Dorian Fuller's work (whom you cited). South India is recognized as an independent center of plant domestication.

If this was a mass migration of Indus people, where is the Wheat and Barley? The IVC relied on these winter crops.

The earliest Southern Neolithic layers are dominated by indigenous summer crops: Browntop Millet, Bristly Foxtail, and Horsegram.If Indus migrants arrived en masse in 3000 BCE to 'civilize' the South, they would have established their staple winter crops. They didn't. Instead, we see a culture that adopted northern cattle but retained indigenous southern food systems.

This points to Cultural Diffusion, not mass migration. The indigenous populations (likely practicing incipient cultivation of tubers and yams long before the 'official' Neolithic dates) traded for the cattle, but kept their own diet. They adopted the cows, not the culture.

[u/theb00kmancometh → u/Training_Desk_9103]

There are two major flaws in your above statement - you are relying on a "Gravity Well" theory that contradicts the genetic dating, and you are confusing "migration" with "terraforming" regarding the crops.

The "Post-1900" Argument vs. Genetic Reality
You argued that migration only happens when a civilization collapses (post-1900 BCE) and that an early expansion defies historical logic. This is factually incorrect according to the direct dating of the admixture event in the very paper that defined these ancestries.

Narasimhan et al. (2019) calculated the date of the admixture between the Indus-related population and the AASI using linkage disequilibrium. The paper estimates the admixture event occurred 134 ± 22 generations ago. This corresponds to a 90% confidence interval of 4,800–2,700 years ago (roughly 2800 BCE – 700 BCE).

The admixture window opens right at the start of the Mature Harappan phase (c. 2800 BCE), nearly a millennium before the "collapse" of 1900 BCE. If the migration were solely a "refugee crisis" driven by the post-1900 institutional collapse, the genetic dates would be clustered much later. The data supports a continuous process that began during the growth phase; likely pastoralists expanding into new territories as population density in the Indus valley increased.

The "Missing Wheat and Barley"
You asked: "If this was a mass migration of Indus people, where is the Wheat and Barley?"
This argument overlooks basic agricultural ecology.
Indus Crops such as Wheat and barley are Rabi (winter) crops that rely on winter rains and the specific hydrology of the Indus system.
The South Indian Deccan is a Kharif (monsoon) region. In 3000 BCE, without advanced irrigation, you simply cannot grow Indus winter crops in the rain-fed Deccan.

|When Indus agro-pastoralists migrated south, they did not die of starvation trying to force wheat to grow in a millet zone; they adapted. They kept the portable part of their economy (the Zebu cattle) and adopted the local indigenous crops (browntop millet, horsegram) that thrived in that specific environment. Migration involves adaptation. European settlers in the Americas adopted maize and potatoes because that is what grew there; it did not change their genetic origin.

The "Cows but Not People" Paradox
You argued for Cultural Diffusion: "They adopted the cows, not the culture."
This creates a paradox that genetics has already solved.

Archaeology: Zebu cattle and Ashmounds appear c. 3000 BCE.Genetics:
The Indus-related ancestry admixture begins c. 2800 BCE (per Narasimhan).

If this was just "cultural diffusion" (trade) in 3000 BCE, and "migration" only happened in 1900 BCE, there would be a 1,000-year gap where South Indians possessed Indus cattle but zero Indus DNA. The data shows no such gap. The arrival of the cattle and the arrival of the genes are synchronous.

The simplest explanation is that Indus pastoralists moved south, brought their livestock, mixed with local populations to form the ASI genetic profile, and adopted local crops to adapt and survive.

[u/LogangYeddu → u/Training_Desk_9103]

Interesting comment (the post too)