MAOA Violence Gene?  That's what some criminologists believe. Do some ethnic groups have more MAOA?
Channel: Eric Dondero, Right-Anthro & Human Origins
Date: 2023-12-31

Hundreds of Thousands of years of natural selection in entirely different environments.  Certain genes for a more violent predisposition may have been selected for in Africans, given the often hostile environment of the savanna.  

But is that a negative?  A propensity for violence may have been a valuable survival skill.  It may seem out of place in a 21st century environment.  However, the ancestors of modern Africans may have had a distinct advantage.