monogamy is not a natural state for men...and some cultures worldwide....usually the less civilized don’t even make any pretense about it
however..during Pax Romana and the advance of the Church there is no doubt at least to me that at least the concept of a nuclear family with a loyal manhead is the best avenue for the advancement of any of any human group and those that don’t do this regress into serial polygamy tribalism
look around the world at cultures with parity...and just who did they learn their governance and modern behavior from?
and why?
While doing research in birds with roughly the same pattern of monogamy and cheating as humans, biologists wondered why the trait to “cheat” was not more widespread, after all a male bird that nests down with a female mate, but runs off when she isn't looking to mate with another female - has DOUBLED his paternal contribution to the next generation.
They found out a very interesting thing.
When the male bird was off looking to cheat, his female was often entertaining offers to cheat from other male birds.
Humans are mostly monogamous, and this works well because children need a father, and we work much better as a pair than alone. But fully 10% of the human population is not born to the guy who mom said was their dad.
Momma’s baby. Daddy's maybe.
Well put. Of course, the Laconian Spartans thrived for three hundred years under a totalitarian system which featured the killing of (as they saw it) weak infant boys, completely brutal indoctrination into a state of permanent warfare, and pederasty, so, ya never know. :’)