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,
Evolutionary theory of the self into the next two problems of the traditional conception of self. These problems are that the traditional conceptions of the self argue that the self is a unified mechanism that exists in a centralized area in the brain, and that the self is something we can consciously sense. The problems with these accounts are that there is scientific research contradicting the claims of traditional conceptions. Llinas suggests that the self is a form of perception and thus that the self is an invention of the brain just as secondary sensory qualities are. He argues that there is no one brain