Do you think there is a “murder” gene? Or genes that make people prone to violence?
As far as being prone to violence I would say there is no human population that hasn’t demonstrated this tendency.
Some have, historically, been better at it than others; but the tendency to violence, and organized violence - is a human universal.
Do you think people who kill people against the laws and customs of their people tended to have higher or lower reproductive success? Usually the penalty for such is death, exile, or imprisonment - all three which tend to curtail reproductive activity.
-—Do you think there is a “murder” gene? Or genes that make people prone to violence?
Not anymore than I think there’s an intelligence gene. Intelligence is hard to define.