I know, but demographic pyramids are what you started out talking about, and that's what I was responding to, then you suddenly switched to talking about wealth distribution as if it was the same thing.
That may be a factor, certainly, but I don't see that it has to have a single root, that's an example of the maxim that any complex problem has a solution that's simple, compelling, and wrong. The major monotheisms have a significant role in it, with their devaluation of women and misinformation about their natures, but that's rooted in ignorance and mythology and the disturbed misogynistic personalities of a few people like St. Paul. Personally I think the notion that history can be understood as an oppressive struggle between men and women rooted in male insecurity is absurd, it's far more complex than that and there's really no good evidence that it's true anyway, it looks to me an invention from the lunatic fringe of post-modern feminism.