>>159100Women choose. Men propose, women dispose. The ultimate final say belongs to the female of the species. They have eggs, we have sperm. They carry babies and give birth, we bust a nut. This means that, in strictly reproductive terms, women are worth more than men.
But women's innate Hypergamy means that they just plain don't want most men. The rub is that you need most men to have a stake in society if you want stability and peace. The way you do that is monogamy. You regulate the female tendency to cheat and "trade up" and the male tendency to bail out after busting a nut.