The material describes a very brief process of population mixing in India, occurring just after the arrival of white people, which stopped about 2-3 thousand years ago. White people imposed a caste system to stop the exchange of genes with the primitive Dravidians - apparently, they observed the negative consequences. Two main groups formed: Ancestral North Indians (Arians - Slavs are related to them, share the same haplogroup R1a, only the highest castes) and Ancestral South Indians (Dravidians - genes of hominids, Denisovans). The caste system blocked further mixing, creating a stable genetic gradient. This allowed civilizations to survive in the area. Dravidian genes can be extremely dangerous to brain function - despite the insane numbers, there is a lack of scientific achievement, even in dravidian hybrids. The Aryans, Arians, Aryans, in the course of their migration split, some ending up in India, and the rest wandered further north in consequence becoming today's Slavs, among others. The highest Indian castes would be basically people like us, because quite recently they were, however, it is important to remember the initial stage of mixing with the Dravidians (Denisovans) - white people do not have the genes of this hominid. Who belonged to which caste, and which genetic group can of course be seen with the naked eye by the shape of the skull, the size of the brain, the color of the skin.