Conversation so far:
What was the name of the books?
A Conflict of Visions.
What else was he known for?
The Vision of the Anointed, where he compares the conservative/libertarian and liberal/progressive worldviews.
What year did his first book come out?
The Economics and Politics of Race, (1983).
Are there any other interesting aspects about this article?
He claims that many problems identified with blacks in modern society are not unique.
What else did he claim?
In Affirmative Action Around the World Sowell holds that affirmative action covers most of the American population, particularly women, and has long since ceased to favor blacks.
Anything else stood out to you?
Sowell described his serious study of Karl Marx in his autobiography.

Question: How did he describe it?
Self-contained rewrite: How did Thomas Sowell describe Marx's philosophy?