I'm sorry to bring Nature into this, but you ever notice how Pregnant Women get Huge bellies, and later into it could no more run 100m than a Sea-Cucumber? Yeah, well that doesn't get a whole lot done out on the Hunting-Plains, where quickness on the feet would often separate Survival from Doom. And yo, can I blow your mind 1 tiny time more? The reason we progressed to Yakking on I-Phones all day was our inclination to eat cooked meat, you know, the kind from the animals that were Hunted? And herbivore tribes, sorry to say, were left behind in the old 'brain evolution' thingy, because cooked meat is so bio-available protein rich, it accelerated cognitive progress. So rocks became rocks attached to sticks became leaders VS. followers. You throw 100 000 yrs into this interplay between sexes, you get brains hardwired for certain Inclinations & Proclivities. But forget all that eh? Just go back to watching your ridiculous TV people talking about how Everything is a Social Construct.