 Game theory has been a major tool in many of the philosophical considerations of cooperation, extended with computational methodologies. Here the primary example is the Prisoner’s Dilemma, a strategic interaction between two agents with a payoff matrix in which joint cooperation gets a higher payoff than joint defection, but the highest payoff goes to a player who defects when the other player cooperates (see esp. Kuhn 1997 [2019]). Formally, the Prisoner’s Dilemma requires the value DC for defection against cooperation to be higher than CC for joint cooperation, with CC higher than the payoff CD for cooperation against defection. In order to avoid an advantage to alternating trade-offs, CC should also be higher than \((\textrm{CD} + \textrm{DC}) / 2.\) A simple set of values that fits those requirements is shown in the matrix in  Figure 14.