I'm skeptical of any American "Libertarian" especially when it comes to race. Sowell is a class-reductionist, which would make him a terrible pick for this topic.
Class reductionism is basically saying that disparities that appear to be due to race, gender, orientation, etc. are really just economic differences, so if you can "fix" the economic bit the rest just solves itself.
The term is, somewhat ironically, often applied in a reductionist manner.
Robin DiAngelo explicitly said "Biologically, race isn't real. But socially, race is a very real set of socialized worldviews shaped by segregation and superficial anatomical features. The white experience of both the majority and systemically powerful is one which normalizes a rejection of the existence of our own bias and enables us to ignore the existence of radically different lived experiences."
A bias towards normalizing whiteness and being blissfully ignorant of the lived experience of others is being blamed, not genetics.
So it's not really about race, then, but about politics all along? I think you'd agree with Sowell a lot more than you imagine in that case!
Sowell has the advantage of being black, which makes his view closer to home than the vast majority of anti-racism activists, who seem to frequently be white people telling other white people what black people find offensive (see: comments on the GitHub master/main discussions).
Sowell also ends up on the receiving end of genuine racism, at least according to his own claims, in particular racism of the form "why are you conservative and telling black people to solve your own problems when you're black?", as if being black actually requires him to be on the left, or makes him some sort of race traitor if he isn't.
