I can't help but wonder if this is a case of correlation != causation. I'm thinking particularly because the focus is on patriarchal, unequal and heavily strat

I can't help but wonder if this is a case of correlation != causation. I'm thinking particularly because the focus is on patriarchal, unequal and heavily stratified societies. That makes me wonder if it would make for a different study if it compared with gender neutral polyamorous societies with many-to-many relationships. I'm not aware that such societies exist in socially significant volumes outside of small groupings though. Still, it smacks a little of Eurocentricism.