We already knew individuals vary in intelligence and personality, so those examples don’t seem to me to provide any new evidence against psychological unity in the sense we’ve mostly been using it. Does the book give other examples of human psychological differences that might have arisen in the recent past?
We already knew individuals vary in intelligence and personality, so those examples don’t seem to me to provide any new evidence against psychological unity in the sense we’ve mostly been using it. Does the book give other examples of human psychological differences that might have arisen in the recent past?