I’m not so sure you can discount group selection amongst humans as easily as you can for other animals. Human groups are a lot more cohesive than those of other species. A human tribe can decide that another tribe, due to their different culture or whatever, must die—even when the expected cost of carrying out a war far outweighs the expected gain in resources. We have subverted the original evolutionary purpose of our adaptations with culture, and I’m unconvinced that the arguments against group selection still hold weight with humans.
I’m not so sure you can discount group selection amongst humans as easily as you can for other animals. Human groups are a lot more cohesive than those of other species. A human tribe can decide that another tribe, due to their different culture or whatever, must die—even when the expected cost of carrying out a war far outweighs the expected gain in resources. We have subverted the original evolutionary purpose of our adaptations with culture, and I’m unconvinced that the arguments against group selection still hold weight with humans.