You don't have to go to the absurd "cheater gene" degree. Note this is not at all scientific, but rather trying to point out how easy some small genetic things

You don't have to go to the absurd "cheater gene" degree. Note this is not at all scientific, but rather trying to point out how easy some small genetic things might push society and culture in particular directions. Suppose instead that a few traits like: - Social Intelligence - Impulse Control - Desire for Retribution have normal distribution with slightly different peaks in different populations. A population with high social intelligence and low desire for revenge might tolerate more cheating(since people only cheat when they can get away with it) than one with low impulse control and high desire for revenge, where cheating might spark a shootout. You probably don't have to move those distributions much to start seeing pretty large changes in things like mass shooting demographics, or who cheats.