They migrated into the fucking cold, for one.
Brown people have all that "outer world" chaos baked into their genes. White people just hid in their houses.
You just contradicted yourself. Whites have been the ones to make the uninhabitable, habitable. Niggers just fester in the warm, fruitful areas they happened to spawn in, like the animals they are. They never even crossed the desert, because they never dared even dream of it. Whites are full of adaptations to struggle, the struggle you pretended that whites didn't go through, we went through more than niggers, ironically. An adult nigger has the approximate intelligence of, at best, a 10 year old white kid (again, at best - nigger brains are actually still inherently worse at certain things due to lacking development in certain areas like the pre-frontal cortex). Whites are more intelligent, specifically because the dumber ones didn't make it. Shit-for-brains brownskins couldn't hack it up europe. Not one single shitskin individual, not one single nigger, throughout all of mankind, all of history, was able to compete.
The entire negroid race, at the time comparatively huge numbers - not one could compete with us. Because they were, and remain forever so through their genes, inferior. They are literally a lower class of human, a sort of living proto-human.