In 1980, Robert Axlerod published the first article in what would become his book The Evolution of Cooperation. Based on a fascinating experiment, actually a tournament he conducted, he coined a negotiation strategy, Tit for Tat. Axlerod invited contestants, first from the United States and then from around the world, to submit algorithms that could be deployed against the classic game theory example, the Prisoner’s Dilemma. In its most simplest description, two suspects w