IQ correlates with height.

I think a big factor is the "victims are morally better" mindset that started around the 60s. Before that, no one cared about refugees, for example, because they were, obviously, losers. Then the peaceniks started squawking about "war crimes" and "humanitarian aid" in the context of the people who lost deserving to be given consideration just because they lost.

Translated to our school culture, there are plenty of athletic, tall, charismatic men at all the top tier universities (well before they started the practice of ignoring standards to recruit meatheads) competing at the highest levels of sport, who had the intelligence and ability to be physicists. But we started only caring about the losers, going so far as to pretend that only the geeks and nerds were intelligent because that would mean "everybody is equal but some people excel at different things". See also: "women are physically weaker but are better at intellectual pursuits/the arts/dealing with people" and other myths.

It was basically the point that Liberalism turned necrotic.