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.
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.
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.
Imagine trying to explain impressionism to some conscript squaddies.