The farther from the equator homo sapienes migrated, the less melanin and the greater the IQ. People had to get smarter to survive in a cold climate with four seasons.
White is not a race. Black is not a race. There is no scientific basis for race at all. It’s a social construct. Compare black Kenyan marathoners and black West-African sprinters. Both black, different adaptations. There is no such thing as “race.” Except that the term is useful to Communists who want to destroy our society.
“There is no scientific basis for race at all. It’s a social construct.”
Many communist sociologists have said so. Using the same strategy, those sociologists claim that gender is also a “social construct.”
Social construct or not, something caused Detroit to go from richest city in the world to 3rd world in 50 years. The characteristics of the population changed. Those characteristics could be broadly called “race.” Those groupings of characteristics are highly predictive of behavior in populations.
If it’s a social construct, it’s a useful one; it’s the one that Jesse Jackson wisely uses to cross the street when a group of black men is approaching.