Human large-scale cooperation as a product of competition between cultural groups
Article in Nature Communications, February 2020. Since this topic repeatedly comes up in our discussions. The abstract: “A fundamental puzzle of human evolution is how we evolved to cooperate with genetically unrelated strangers in transient interactions. Group-level selection on culturally differentiated populations is one proposed explanation. We evaluate a central untested prediction of Cultural Group Selection theory, by assessing whether readiness to cooperate between individuals from different groups corresponds to the degree of cultural similarity between those groups. We documented…