As life and civilization began in Africa, when did the sub human species/ethnic groups evolve?
Humans departed from Africa well over 100k ago, and that group expanded out into Asia and Southern Europe and Australia. then there was some kind of natural disaster, probably the volcanic super eruption of mount Toba, that wiped out a large chunk of the population, isolating groups of survivors and allowing them to drift apart a little genetically. Then these groups expanded out again when the conditions improved, forming the basis of today’s modern races. The native Americans are closely related to the Asians as most of their population arrived only about 15k ago, not enough time to develop a lot of differences. Mostly racial differences are caused by geographical isolation and time. One group will get a mutation the other doesn’t have, it becomes the norm for that isolated group , and something that makes them look or behave differently to the rest. Collect enough of theses differences and you have a subspecies, but humans haven’t drifted apart that much. So the real distancing even
