Promotion of eugenics has primarily been a liberal cause, historically. Supporters include progressives like Roosevelt and Hoover, opponents were conservatives

Promotion of eugenics has primarily been a liberal cause, historically. Supporters include progressives like Roosevelt and Hoover, opponents were conservatives like Chesterton and the Catholic church. "Building a better man" was a major tool of socialists, and it wasn't restricted to education. https://en.wikipedia.org/wiki/Eugenics#Supporters_and_critics https://en.wikipedia.org/wiki/Eugenics#Supporters_and_critic... In fact, the legacy of this exists today - note that the Communist party of China is the main practitioner of eugenics today (see Yao Ming). It's only in the modern era of identity politics, inequality as a real concern, and racial spoils systems that liberals have come to oppose it. If we acknowledge that intelligence is genetically determined, then we might be forced to recognize the tradeoff between individual fairness and statistically equal distribution of spoils. We might also be forced to acknowledge that inequality is a result of inborn meritorious traits (intelligence, conscientiousness) rather than some external unfairness.