if i gotta be honest
the worst thing about society is humans make shit up about race
northern europeans are seen as having blonde hair but its really a stereotype and has no evolutionary "advtantage." In fact, there is barely any significant evolutionary differences in humans.
Northern europeans are very white, thats it. southern europeans are white. africans, are black because of more melanin cause it helps protect from uv which is more prevalent near the equator.
The only adaptations in humans are skin color and eye shape, that are known