Quite the twitter storm over this article.
Dunno about migrations, genetics and other stuff, but linking the Veda or the caste system to them (as that article insinuates) is absolute bollocks. The veda is neither a geographical nor a historical text, it is completely religious in nature. It has been misinterpreted by historians, philologists and modern day fraud "gurus" without access to ancient tradition. There are specific rules to interpret the Veda. I should know, philosophy is my forte.
Of course, I know nothing about genetics, so I can't comment on that. This despite majoring in Biotechnology. Kinda veered away from it, I hated the subject
As an example, to prove that light skinned "Aryans" wrote the Veda and subjugated the native dark skinned "Dasyus", these historians quote mantras like these from the Rg Veda:
akarmā dasyurabhi no amanturanyavrato amānuṣaḥ | tvantasyāmitrahan vadhardāsasya dambhaya ||
The meaning for this given by the historians is:
"Around us is the Dasyu, riteless, void of sense, inhuman, keeping alien laws. Baffle, thou Slayer of the foe, the weapon which this Dāsa (barbarian) wields."
So, these historians contend "Aryans" subjugated the native "Dasyus/Dasas" with force apparently based on mantras like these. Sort of like Genghis Khan and Alexander, but more benevolent.
However, such nonsensical interpretations throw grammar and context to the winds. The correct interpretation would be as follows:
"Around us (enveloping us) is that (matter/prakrti) which is different from “karma” or actions, ie, the non-doer of actions (akarmA), the “dAsyu” or the hostile as it is antagonistic to the self (by obstructing knowledge), the insentient (amantur), that which is different from that which spreads or extends, ie attributive intellect (anya-vrata; vratati iti vrata), that which is different from the self which is capable of meditation (mAnuSha – manana shIla; amAnusha is the opposite of it). You (the Supreme Being), who are the slayer of the enemy (the mind which is the enemy of the self), destroy the impelling inclinations (karmas/vAsanas that impel us to attachments) of the self known as "dAsa" as he is the slave to these attachments."
So this mantra simply declares the difference between the body and soul as per vedanta and how the body and mind are enemies as they cause attachments, and is a prayer to overcome them. I gave this as an example because the historians use such mantras as bread and butter for their invasion theories.
Its' quite strange how historians have come up with wholesale theories of invaders writing the Vedas based on misinterpretations. The caste system is whole another kettle of fish. Don't get me wrong, if you find empirical proof, fine, but if they try to pass off the Vedas as a documentation of the history or geography of those times, I am inclined to take it with a pinch of salt.
Apologies if I hurt anyone's sentiments, ofc. Don't mean to turn it into a religious/philosophical discussion, but actually both are linked to this topic. Won't say more on this.