For the few of you that don't already read Roissy, check this out:
[T]he absurdity of mid-20th to early 21st century feminism and all its adjuncts are better understood as progressively sophisticated emergent sexual selection strategies which act as social obstacles to filter out men who aren’t able to successfully navigate them. In essence, feminism is an advanced biocomputational Turing test; a giant social subcommunication roadblock devised and embraced by women and, at least in principle if not in practice, by alpha males intended to ensure the continuation of the hypergamous weeding out of lesser men who don’t possess the savvy to play by ever-shifting sexual market rules. Feminism is only superficially about female equality; at its core it is a ginanomicon of secrets to which only socially adroit men are privy.
Why feminism? Why now? In a word: Beta males acquired too much power. The ascendance of the beta male (and, not coincidentally, the rise of American power) through the late 19th century to the mid-20th century, exemplified by the common man seeing his income and standard of living rise and his opportunities for marriage with quality women rise in response, resulted, as is necessary in the zero sum sexual market, in a lessening of female market leverage to satisfactorily satiate their hypergamous impulse. As I wrote back in this post:
Roissy Maxim #15: Female cultural equality = male dating inequality. Female cultural inequality = male dating equality. You cannot have both. So sayeth human nature.
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Given the endless appetite of women to date up (even though there is evidence that engorgement of this appetite makes them unhappier), this wide and deep Beta Ascendance was an evolutionarily unstable environment. New complex memes would naturally arise in reaction to assist in pushing the evolutionary envelope of what qualifies as an alpha male, and here feminism and its discontents, its counterintuitive criteria and amorphous edicts, entered the vacuum left by the absence of widely practiced hypergamy to serve as the newest iteration of female sexual selection strategy. And the winners were the alpha males who could mouth the right platitudes while practicing the dominant behavior that put the lie to those same platitudes.
I would push back on that last bit, though. Roissy himself has nothing but contempt for those men who "mouth the right platitudes," identifying this behavior as the mark of the "mangina". But certainly the primary effect of feminism has been to increase inequality among males and thereby make hypergamy easier to indulge.