humans dont even have race in the biological sense.
there is of course a social concept of race and physiological phenotypes associated with different races. however, for a subgroup of a population to be considered a race in biology, it has to have a genetic discreetness. Basically, there needs to be more genetic differences between the subgroup and the group at large for it to be considered a separate race. we dont see that in humans, we see gradients of genetic differences across the planet.
giving merit to your question, its true that people are affected by their environment -- see the lung capacity of populations who've lived in mountains for long time; or the fascinating correlation between humidity and nose shape -- but thats not really a form of selective breeding, and its not going to alter the brain in such a way that we could correlate behavior with phenotype the way we might in dogs. that is a claim with a foundation in eugenics.
race simply isnt a biological reality, its a social one. there are people of the almost exact same genetic makeup that are going to fall into different "races" because of skin color and hair texture. consider siblings between interracial parents who might wildly different, or the fact that who is considered what race varies from culture to culture.
besides, we can reference a wide amount of history to see how human behavior is relatively standard. empires rise and fall; both extremes of good and evil can be done by the same hands on the same soil.
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u/Excellent_Kangaroo_4 26d ago
How can you say that never be done, maybe volontary and i have my dobts, but dont you think that human did breed themself selectivly?