Indigenous Aryans were inter-related, and the notion of biological race came to the forefront The "Aryan race," the presumed identity of Indo-European language speakers was prominent among such races, which was seen to be further subdivided into "European Aryans" and "Asian Aryans," each with their own homelands. Max Mueller, who translated the Rigveda during 1849–1874, postulated an original homeland for all Aryans in central Asia, from where a northern branch was believed to have migrated to Europe and a southern branch came to India and Iran. The Aryans were fair-complexioned Indo-European speakers who conquered the dark-skinned "dasas" of India. The upper castes,
Indigenous Aryans of the land, whereas Brahmins were Aryan and alien. The upper castes had their own uses for the Aryan theory. Keshab Chunder Sen saw the English rule in India as a "reunion of parted cousins." The nationalist leader Bal Gangadhar Tilak endorsed the antiquity of "Rigveda", dating it to 4500 BC. He placed the homeland of the Aryans somewhere close to the North Pole. From there, Aryans were believed to have migrated south in the post-glacial age, branching into a European branch that relapsed into barbarism and an Indian branch that retained the original, superior civilisation. In contrast to the