Early 20th Century on line 5 for you, they want their eugenics back.
Early 21st Century on line 6, reminding you that blank slate theory is widely considered debunked, and that evolution is real.
Observing that some skills and traits diverge when populations are geographically isolated isn't a prescription. Populations that stayed in Africa, under high levels of sun exposure, passed along higher melanin content. Populations in Northern European regions lost melanin in a way that allows for better Vitamin D processing. Some populations sexually selected for height, other populations sexually selected for aggression or muscle density or big breasts or any number of other heritable traits. To some extent, intelligence is heritable... but cultural emphasis on intellect also matters. To some extent, athletic performance is heritable... but social focus on competition and sports also makes a difference.
It's not one or the other. And accusing anyone who observes the real differences between groups of engaging in eugenics is a low blow that ignores evolution. Nobody at all has proposed controlled reproduction or sterilization in order to enhance specific traits, thus it's a misplaced ad hominem. On the other hand... if you want to pretend that sexual selection has no impact, I have a wolf here for you to consider:
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