Not exactly, but also yes. There is a game being played where there are local optimums of a ratio of cooperating/betraying and evolutionary pressure against th

Not exactly, but also yes. There is a game being played where there are local optimums of a ratio of cooperating/betraying and evolutionary pressure against the “wrong” ratios. There is also the problem of it being difficult or too resource intensive to have perfect knowledge of what other individuals actually share your genes and by how much and some group altruism is explained by evolution taking shortcuts that work well enough. The point of the book is that the mechanism explaining such things shouldn’t stop at “because it’s good for the group” instead digging down into why what’s good for the genes must explain the higher order behavior.