I first saw some of the story retold in Matt Ridley's book Origins of Virtue [1]. It must've left an impression, since I still remember it, if only in the bares

I first saw some of the story retold in Matt Ridley's book Origins of Virtue [1]. It must've left an impression, since I still remember it, if only in the barest outline. [1] https://en.wikipedia.org/wiki/The_Origins_of_Virtue https://en.wikipedia.org/wiki/The_Origins_of_Virtue