"Where do ‘good’ or pro-social institutions come from? Why does the capacity for collective action and cooperative behaviour vary so much across the world today? How do some populations transcend tribalism to form a civil society? How have some societies gone beyond personal relations and customary rules to impersonal market exchange and anonymous institutions? In short, how do you “get to Denmark”? I first take a look at what the “cultural evolution” literature has to say about it. I then turn to the intersection of economics and differential psychology." (See also: “Experimenting with Social Norms” in Small-Scale Societies.)