Little tidbit that isn't mentioned in the article: he was a consultant on the film Quest for Fire and developed movement patterns and gestures for the actors.
“The Naked Ape” is seminal work. When I found it in the bargain bin of used bookstore I was incensed!
His anthropological views raised more questions than answers, challenging us to ponder just how far modern humankind had progressed from our days of living in caves and hovels, dressed rudimentally in animal hair. His conclusions could be arbitrary, but nevertheless provocative.
Is this the same guy who wrote Peoplewatching (Manwatching, I believe, is what it was called earlier)?
The infamous orgasm episode (NSFW): https://www.youtube.com/watch?v=2RkhQsGCXco
RIP. He's better known for his works about people and sex, but I know him from his book "Catwatching", which is a very thoughtful observational study of cats.