History is one thing, but dead arguments about race and factual ones about archaeology are all different. It's likely each colour and race came from mixed marriages, albino's and nomadic tribes. We're all the same inside but viva la difference. Read about the African and Asian history of China whilst noting origins all seem to come from Caucasus Mountains, Sumerians or Iran areas, and spread from there, some skin getting darker and so on. But - remember to check for translations and updates in archaeology as scientific dating is improving all the time! Think about how breeds of dogs and horses are and how they've changed and remember ancient Greeks (original Asian/African?) and oldest civilsations like the ancient Kirat Kings of Nepal, very similar to native Americans. All tribes really.
This video is also interesting