The Origins and Spread of Indo-Iranian Languages

TLDR The Indo-Iranian languages have a rich history and have spread across vast distances, with the first documented evidence of an Indo-Iranian language coming from the Mitanni Kingdom. The emergence and expansion of Indo-Iranian speakers was influenced by intense cultural contact and the already connected world, with the chariot and horseback riding playing a significant role in this movement.

Timestamped Summary

00:00 The Indo-Iranian languages have spread across a large portion of the globe, shaping the history of Eurasia and beyond, and in the next two episodes, we will explore their origins and the population movement that brought Indo-Aryan speakers to South Asia.
04:38 This is a story about people moving over incredible distances, making epic journeys, and the limitations of using artifacts, DNA, and language to determine ethnic and linguistic identity.
09:01 The first documented evidence of an Indo-Iranian language comes from the Mitanni Kingdom in the Near East, which bordered the lands of the Hittites and Babylonians, and by the middle of the second millennium BC, the Indo-Iranian branch had already diverged from proto-Indo-European and had separated into its two major branches, Iranian and Indo-Aryan.
13:35 The Sintashda culture, associated with the Proto-Indo-Iranians, was a multicultural and multilingual world that existed alongside other Indo-European groups, foragers in Siberia, and the Bactria-Margiana Archaeological Complex.
19:13 The Sintashda people were speakers of Proto-Uralic, which eventually gave rise to Finnish, Estonian, Hungarian, Sami, and many other languages, and the formation and expansion of Indo-Iranian was not a self-contained, hermetically sealed group, but rather a world defined by contact between different groups and the movement of ideas and people between them.
23:30 The Sejma Turbino Network, which extends across different archaeological cultures, suggests that the Sintashta settlements with their Indo-Iranian-speaking elite were not isolated, but rather part of a larger world shaped by contact and interaction with other groups, including Uralic-speaking peoples, leading to population mixture and the spread of Indo-Iranian languages.
27:57 The Andronovo culture, which emerged after the Sintashta culture, is considered to be a material expression of a group that spoke Indo-Iranian, and the cultural ties and genetic samples indicate a clear connection between Sintashta and Andronovo.
32:34 The division between the Iranian and Indo-Iranian branches of the Indo-Iranian language family likely took place around 1500 BC or slightly earlier, based on the attestation of the Indo-Iran branch in the Mitanni Kingdom and the oldest layers of the Sanskrit texts in the Rig Veda, and the Iranian branch in the Avista texts associated with Zoroastrianism.
36:57 The Oxus Civilization was not Indo-Iranian, but it had some connection to the Indo-Aryan migration and shared a non-Indo-European language, likely due to trade and interaction between settled agriculturalists and mobile pastoralists in close proximity.
41:33 Steppe people with Sintashtha connections traveled south and east through the Inner Asia Mountain Corridor, coming into contact with the people of the Oxus Civilization, leading to cultural contact and the introduction of loanwords, potentially indicating the presence of early Indo-Aryan speakers.
46:06 The emergence and expansion of Indo-Iranian speakers, including the Indo-Aryan branch, was a result of intense cultural contact with other groups and the already connected world, with the chariot and horseback riding serving as a multiplier effect on this movement.

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