input: [Introduction: Too much wisdom] Ch.3: Reciprocity with a vengeance
output: Zigong asked: ‘Is there any single word that could guide one's entire life?’ The Master said: ‘Should it not be reciprocity? What you do not wish for yourself, do not do to others.’ (Analects of Confucius) Many species have a social life, but among mammals, only humans (and naked mole rats) are ultra-social – able to live in very large cooperative groups. The golden rule, supplemented with gossip, is the secret of our success. Understanding the deep workings of reciprocity can help you to solve problems in your own social life, and guard against the many ways people try to manipulate you.