Well - a bit about censorship. But only tangentially, in that burning off the old ideas is necessary to keep 451-America holding together. So censorship comes into it, but I agree that the main thrust of the book is about how the population have been gently brainwashed into not only neglecting independent thought but actually being scared of it. Playboy, of all places . . . Yeah, it was. It began as a long short story, then Bradbury expanded it into a short novel. It's still a very slim volume compared to some of the other classics.