Supercooperators: altruism, evolution, and why we need each other to succeed

The struggle

The prisoner's dilemma

Five ways to solve the dilemma. Direct reciprocity : tit for tat ; Indirect reciprocity : power of reputation ; Spatial games : chessboard of life ; Group selection : tribal wars ; Kin selection : nepotism

Feats of cooperation. Prelife ; Society of cells ; The lord of the ants

From cooperators to supercooperators. Gift of the gab ; Public goods ; Punish and perish ; How many friends are too many? ; Game, set, and match ; Crescendo of cooperation.