The Paris Review recently re-published a set of interviews with Kurt Vonnegut and posted them on their site (one of the interviewers was George Plimpton!).

Excerpt:

INTERVIEWER: Did the study of anthropology later color your writings?
VONNEGUT: It confirmed my atheism, which was the faith of my fathers anyway. Religions were exhibited and studied as the Rube Goldberg inventions I’d always thought they were. We weren’t allowed to find one culture superior to any other. We caught hell if we mentioned races much. It was highly idealistic.

Here’s the complete text via The Paris Review – The Art of Fiction No. 64.