This volume is devoted to the origins and early history of the Indo-Aryans. According to the generally accepted theory, they originated in the Eurasian steppe, from where they subsequently migrated to the Indian subcontinent and the Iranian plateau. However, evidence to support these developments is lacking. The author has collected linguistic, palaeogenetic and archaeological data to reconstruct the processes that occurred in the Eneolithic and Bronze Age over large areas of Eurasia, demonstrating that the ancestral homeland of the Indo-Iranians was in Northwestern Iran. From there some migrated to Southeastern Iran, which led to the emergence of Indo-Aryan dialects around the beginning of the 3rd millennium BC. From the middle of the 3rd millennium BC, the migration of Indo-Aryan tribes to the north-east of Iran and Central Asia began, which later culminated with migration to India, as well as to the Near East, Eastern Europe, the Southern Urals and, occasionally, to Southern Siberia.