I could go into more of the anthropology that impacts on behavior, how trade, Ag, property ownership and money changed behavior over the millenia, but it's too long and involved a topic to do a decent treatment of for me these days. Suffice it to say that when organized in groups around the size of Dunbar's Number within around 2 orders of magnitude, human nature rewards cooperative behavior more and it predominates. Larger than that, greedy and self serving behavior is rewarded better. Once we have a sufficient population crash, we can look forward to the Inner Bonobo in Homo sap to reemerge.🥰

RE