Percentile admixtures of Neanderthals, Denisovans, and possibly unidentified early offshoot hominids is where the upper races get much of their differences and various pre-historic migrations from the Mediterranean basin after the opening of the strait of Gibraltar and various ice ages and hot cycles resulting in desertification in north africa and the near east. It's likely that early non environmental migrations out of the cradle of humanity brought about Neanderthals, Denisovans and proto-negroids, and environmental collapse based migrations caused more pure hominids to flee the cradle in larger numbers and genetically and geographically consume those subspecies. I'm curious then who might the most purely "human" being those whose lineage intermixed the least with other subspecies and mixed humans might be, I suspect pacific islanders might be the most genetically "pure" humans in that sense, the white man's beauty and color seems to spring from high Neanderthal admixtures, the distinctive features of east Asians might be a vestige of Denisovans, niggers look the way they do because of proto negroid migrations south into africa and being cut off by the expanding desert, that and probably some actual non hominid admixture, notice how their distribution is disconnected from ours but shows movement away from us the lack of a continuum is proof that niggers were cut off from the rest of humanity for an unthinkably long span of time but the linen moving to and away from where that continuum ought to be is proof of a very distant common ancestor and at least one if not many admixtures in this genetically isolated place, my personal guess is a long "history" of aggressive rape behaviors and killing outsiders. I would love to see more research comparing aboriginal Australians and pacific islanders and skeletal comparisons between these people and the supposed pre east Asian settlement natives of japan and American aboriginal populations. I think if you could chart the drip of Neanderthal admixture it would broadly prove out of africa to be a biased over simplification and instead place a Mediterranean focus on early human development and migration.