What does this even mean? Patriarchy is only about 6k years old. For 97% of human history this social system did not exist. Egalitarianism was the name of the game - something that most anthropologists agree was a central adaptation of human evolution. And once it entered the scene, patriarchy spread rapidly because it was so disruptive - patriarchy being not only a gender dynamic, but an entire system of social stratification based around a dominance hierarchy.
“In other words, inequality did not spread from group to group because it is an inherently better system for survival, but because it creates demographic instability, which drives migration and conflict and leads to the cultural — or physical — extinction of egalitarian societies.” New Scientist
I didn't once say anything remotely in the ballpark of gender being all cultural. I said that the notion that aptitudes and capabilities can be determined by something like a "female brain" and "a male brain" is a social construct which is reinforced from birth.
