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.

Question: What else did he claim?
Self-contained rewrite: Aside from claiming that many problems identified with blacks in modern society are not unique, what else did Thomas Sowell claim?