Indeed, humans clearly have both tendencies in our evolutionary lineage. But I think the point is that humans build societies which enforce behavioral norms ind

Indeed, humans clearly have both tendencies in our evolutionary lineage. But I think the point is that humans build societies which enforce behavioral norms independently of what would emerge based on the “natural” environment. Both bonobos and chimpanzees are locked in their strategies for conflict resolution, which may not always be appropriate for the prevailing environmental conditions.