Roots of 2nd Wave Feminism, by Steve Sailer.
My theory is that a lot of 1969-era feminist rage was private family-based resentment and sibling rivalry turned outward against society as a whole. It’s a pretty sensible ethnic tradition: rather than go public with your family grudges, you make the overall culture feel guilty for somehow causing your anger.
I met a quite a few feminists in my youth, due to family circumstances. The impression I formed was that they were often women who had married men who were not as smart or ambitious as themselves. They grew resentful at their private circumstance, but generalized it to all women. Which is why most women need feminist theory about as much as a fish needs a bicycle.