Caste disparities in India appear to be dominated by geographical differences in skin colour. All of the major ethnic groups can be found in different parts of India, making it a virtual ethnographic museum. This pool of people came to India centuries ago with diverse directions and distinct civilizations, when they were in a tribal state, Ambedkar says of the Aryans, Dravidians, Mongols, and Scythians. All of them, in turn, fought with their forefathers in the country, ate it, and settled down as peaceful neighbours . He claims that caste distinctions are in fact race distinctions, and that treat castes as if they are many different races, and that the caste system cannot be formed as a tool for preventing race mixing or maintaining blood purity. There is a severe factual distortion... In truth, the caste system emerged long after Indias various castes merged in blood and culture Klass shows how skin and hair colours lightened as the country travelled from southeast to northwest, but he finds no evidence that this occurred 3,000 years ago.