Well if a behaviour/culture enhances the reproductive fitness of the family that does it, then it's likely to spread. Even though it's cultural. It's interesting
Yes.What I dislike is people pretending that, just because something enhances the reproductive fitness of a family, it is therefore "right" in any way.
There is no moral value to evolution. Cultural or genetic.
Patriarchy spread over the whole world, not because it is in any way, shape or form "good", but because patriarchy causes overpopulation, and overpopulation causes expansion politics and war, and patriarchy also facilitates wars (men want to rape and/or marry enemy women, women have no such wishes regarding enemy men).
Peaceful indigenous tribes on tropical islands were killed off by their more warlike neighbours. (Probably lots of other peaceful tribes were killed, but this is one example that historians could still find out about because on the island, the peaceful lifestyle could persist for a while) This does not mean that being peaceful and solving conflicts by talking about them like mature adults is wrong - it is just not evolutionary successful, which is a very different thing.
And of course, reproductive fitness is relative. Foot-binding only enhanced the reproductive fitness of families doing it in ancient China because of the very specific culture there.
We can see in Australia that some of the very interesting animals that evolved there do not have an evolutionary advantage anymore after rabbits and dogs were introduced.
Patriarchy, likewise, can only thrive under specific circumstances, that might end some day.
One could even say that patriarchy will end the human race, as with the human overpopulation comes the destruction of the planet.
Evolution is not intelligent. It just happens. Every scientist knows this. Evolution does not plan long-term. Something can be evolutionary successful for a while, and then spell the end of a species.
I detest people who take evolution and try to make it into a religion.