-—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.
Intelligence IS hard to define and different people have various types of intelligence - but there is certainly a degree of intelligence that is heritable - and thus based upon genetics.
So why would you presume that if there WAS a “murderer gene” that it would lead to disproportionate reproductive success?