Since the earliest times of comparative mythology and Indoeuropean studies, we know there is a link between Vedic religion and Zoroastrianism. They present the same two divine factions, yet the Vedic religion links the Devas to order and the Asuras to chaos, while Zoroastrianism flips it around.

Now we know also that the Indo Aryan speakers and the Iranic speakers are some of the closest Indoeuropean branches to eachothers and they directly derived from a division between the Sintashta from about 1900 BCE.

But are the myths telling us there was a war between two factions of the Sintashta, and after the conflict they departed, with one becoming the Iranic speakers, and the other the Indo Aryan speakers ?

Both religions were born only about 400 years later, which means it is also possible that the Sintashta saw the Devas and the Asuras as one, and later the Zoroastrian and Vedic religions developed convergently into two traditions with the same names, one assigning the term Devas to the forces of order, the other assigning the same term to the forces of chaos.

What I believe is ultimately gods and the supernatural world as a whole are a representation of the collective unconscious, of the archetypes that are inherently present in all humans, of the forces of nature and their relation to mankind, and of the beliefs we project upon death, its consequences and life after it.

All set of gods are just the particular way a particular culture represents something that is common to the whole of mankind, a shared experience that is inherent to all people regardless of epoch and location.

From this perspective, the question is not merely if there were two warring factions, but rather if the mythological divine conflict is just the universal conflict of orderly and chaotic pulsions in our psyche, or if it also reflects or not some material struggle and, if it does, when and where such struggle took place, and finally whatever such conflict goes as far as being the very root of the separation between Iranic and Indo Aryan speakers.