interesting wrt androstenone
FuturePundit: Natural Selection Caused Human Male Belligerency
“Really large scale societies that have been settled and centrally controlled for a long time (e.g. China) might have experienced long periods of selection against belligerency as the belligerent men ran afoul of central rule and got imprisoned or killed. So we might expect to find some groups to have lower frequencies of the genetic variants which cause male aggression.”