The Importance of Social Learning in Genetic Group Selection

Boyd and Richardson show that social learning implies that group selection is almost inevitable in cultural evolution. Can you explain why you are skeptical of genetic group selection? Sure. So, the classic concern with genetic group selection is that in order to make group selection run, your groups have to stay different. And if there's a lot of gene flow between the two groups, that's going to create a force that tends to homogenize the groups. But in the case of cultural group selection, you can have migration between groups but human social learning and norms mean that the migrants or the people who find themselves in another group adopt the traits of the new group.