For example from the middle ages to the present, individual self-control greatly increased and this caused homicide rates to drop by a factor of 10. See https://www.vrc.crim.cam.ac.uk/system/files/documents/manuel... for verification.
Elizabethan England was incredibly bawdy by all accounts. And yet the same country a few centuries later was Victorian England, one of the most sexually uptight societies on record. Genetics didn't change that much, how did that happen?
Germany from the mid-1800s through WW 2 was one of the most warlike societies imaginable. Germany since has turned into a country of peaceniks with no interest in invading anyone, and who are unable to even cough up what they promised for self-defense. How did that happen?
The truth is that while factors from genetics to parasites like toxoplasma can impact culture, culture changes far too rapidly to be dismissed as simply an outcome of genetics.
I think it is more likely that culture drives genetics. If you have a group whose culture favors intermarriage, where marriage is encouraged and even arranged between families with intellectual success, and which enables the resulting couples to have many children, that would tend to drive the genetics of the group.
Sexual selection is tied to culture.
