 Man was believed to be post-glacial, and the theory of an Asiatic origin of the Aryan peoples prevailed.The age of the oldest Vedic period, however, was carried back to 4500 BC by scholars including the author himself after scientific astronomical research in correlation with the evidence found in the Vedic hymns.Tilak cites a book by William F. Warren, the first President of Boston University, "Paradise Found or the Cradle of the Human Race at the North Pole", as having anticipated his ideas to some extent.