In his early blog posts, Scott Alexander talked about how he was not leaping through higher education in a single bound (he went overseas for medical school, and failed to get medical residency on his first try, ending up in a small Midwestern city). So I wonder why he is sure that in a world with fewer university degrees, he would have gotten as far as he did (medical schools in the USA used to limit admissions from people of his ethnicity).
Likewise with immigration restrictions: he knows that they often blocked Jews, many Europeans. and East Asians not just brown people right?
Yes, Scott Alexander is an unusual rationalist blogger who had a credentialed professional career as a psychiatrist. After Substack became his patron, he opened his own medical practice, but the website has said "not accepting new patients at this time" since 2022. So he seems to live off gifts from fellow travelers with a side hustle in psychiatry.