there was a thing showing different ways that people evolved and how this explained genetic phenotypes.

for instance blacks didn't really migrate that much, africa was always a really good spot for resources. as such they didn't have to innovate much, because food was relatively plentiful. this made it so that sexual selection played a larger role, thus blacks have larger display dicks because women liked the big dicks. they also are stronger and faster on average but have less room for maximum slow muscle growth. they aren't the brightest people, because their ancestors didn't need to be to survive fine (thinking uses up a lot of calories).

whites on the other hand, that was selected for in arctic environments with short days, long nights, long winters. takes a lot of innovation to survive, a lot of exploiting resources and adapting to changing environments. the selection for blonde hair was a result of clothing covering most of the body, and blonde hair was a visible symbol of youth and fertility (most blonde hair darkens as people get older). violent culture means that whites are more inherently warlike as they fought over limited resources, as white skin, blonde hair, and blue eyes were propagating it is likely that women far outnumbered men do to war over resources. this led to men controlling sexual selection more than they normally do, this lead to neotenous traits spreading faster (blonde haired blue eyed girls were favored for having more children provided for with the limited resources at hand). these people also had goats with them, this is why white people have lactose tolerance. goats could eat things humans couldn't and would provide milk and cheese.

arabs were the ones who turned into whites, but they stayed arabs when they stayed at the fertile crescent. the ones that went further north would eventually turn into the whites.

the native americans, and asians were from a completely different migration out of africa over a hundred thousand years before the migration of the arabs (who crossbred with neanderthals by the way). asians weren't even "humans" when they migrated out, and there are fossils of prehumans in japan that would later evolve into what is japanese and chinese people and other asian races (at the time there was an ice bridge to japan from the koreas).

anyhow good luck finding that stuff anymore. its all racist to study the different natural selection pressures. also you aren't supposed to know that rampant "pedophilia" is primarily responsible for blonde hair and blue eyes. it used to be that these things weren't controversial. but modern politics have narratives they want to push.