Sorry, this may sound flippant, but it's a genuine wonder of mine.
So, say civilisation crumbled tomorrow, in whatever circumstances. Do you think humans would revert to the gender stereotypes you see on programmes/films such as Walking Dead, The Road, The Stand, etc? By that I mean men leading groups with guns and brute force; women playing the "support" role; women being brutalised and raped.... And so on.
I think we would see the very worst of inequality, but would welcome any thoughts!