This is a little bit of a tangent but I was just listening to a program on NPR about baboons and their relationships. Specifically, the toxic effect of being the alpha-male. While I couldn't catch the whole program, I did hear they mentioned that while baboons have tumultuous lives surviving, mating, and dealing with alpha males, they do have a small opportunity for friendship with one another. One of the surprising findings from a study on baboons was that the baboons who were friendlier/not alpha-males tended to have more offspring than the alphas. A case of nice guys winning and friendship being more meaningful than dominance.

Here, I'd gander that it's less about game theory and more about evolution of a cohesive unit. And that's my baboon tangent.