 When the payoff matrix for the population has the values \(T = 2.8\), \(R = 1.1\), \(P = 0.1\), and \(S = 0\), the evolutionary dynamics of the local interaction model agree with those of the replicator dynamics, and lead to a state where each individual follows the strategy Defect—which is, as noted before, the only evolutionarily stable strategy in the prisoner’s dilemma. The figure below illustrates how rapidly one such population converges to a state where everyone defects.