Indo-Aryan migration
He advocated the Indigenous Aryans hypothesis and rejected Indo-Aryan migration theory as a fabricated version of history devised for missionary and colonial interests, and later propounded by left-liberals and Marxists. Dating the Vedas to circa 7000 BC, he also propounded that the Harappan civilization of the Indus Valley corresponds with the end phase of the Vedic Age and thus hypothesized it to be a part of Vedic era.