Optimally Irrational β’ 72 implied HN points β’ 09 Mar 26
- When people expect to meet again, conditional strategies like "Iβll cooperate if you do" make cooperation a rational, self-interested choice because future losses deter short-term cheating.
- Reputation, indirect reciprocity and partner choice scale cooperation: public records, gossip and the ability to shun defectors let groups enforce cooperative norms even when partners change.
- Cooperation has multiple roots β kin selection, reciprocal altruism and cultural evolution β and because many cooperative equilibria are possible, societies pick and stabilize particular norms while moral feelings help people follow and enforce them.