21. Darwin (being un-Darwinian) said “social instincts…with the aid of active intellectual powers… naturally lead to the golden rule.” Game theory shows that simple, rigidly followed rule — without active intellectual powers — can create evolutionarily stable cooperation. And human “games” often have much simpler structures than Prisoner’s Dilemmas (a known bad cooperator is eliminated in advance). It’s early in the study of game theory, but it seems that the behavioral universe has certain stable, high-productivity rule patterns which evolution/culture can discover. And behaviours that violate the “vehicular viability” principle eliminate themselves. Perhaps this explains the similarities among team-economic-practices of Boehm’s surviving hunter-gatherers. - http://evonomics.com/three-evolutionary-ideas-to-change-the-future-of-economics/