That's a pretty weak statement. What even is the point of the word "directly"?
I may directly be in the same country as a terrorist.
I think it's the wrong question.
History is filled with extinct species and people. The better question is, why didn't africans go extinct like other people and species? Why do they thrive without influential civilisation? Why was the subjugation of the americas so much more succesful than that of africa?
We review animal studies that have found darker pigmented individuals average higher amounts of aggression and sexual activity than lighter pigmented individuals. We hypothesize that similar relationships between pigmentation, aggression, and sexuality occur in humans. We first review the literature on non-human animals and then review some of the correlates of melanin in people, including aggression and sexual activity. Both within human populations (e.g., siblings), and between populations (e.g., races, nations, states), studies find that darker pigmented people average higher levels of aggression and sexual activity (and also lower IQ). We conceptualize skin color as a multigenerational adaptation to differences in climate over the last 70,000 years as a result of “cold winters theory” and the “Out-of-Africa” model of human origins. We propose life history theory to explain the covariation found between human (and non-human) pigmentation and variables such as birth rate, infant mortality, longevity, rate of HIV/AIDS, and violent crime.
In 40 species of wild vertebrates, darker pigmented individuals are more aggressive and sexually active. ► Cross fostering studies and pharmacological dose manipulations establish the role of the melatonin system. ► We review the human literature within and between populations and find similar relationships with pigmentation. ► Darker individuals average higher levels of crime, sexual activity including HIV/AIDS, and lower IQ.