The reason the religions all favored monogamy is for the simple reason that while we require a lot of males to fend off other males, (armies) we do not need many domestic males. The fact that the rather obvious solution to this problem is to create armies that produce not only war but commons, and let ‘prostitution’ run wild, and meanwhile the upper 30% of males ‘spread it around’, while we redistribute gains to women who produce offspring – which is how we evolved – is somehow lost on us.