Thus the concern over methodological individualism began to fade away, and might have disappeared completely had it not been for the sudden explosion of interest in game theory (or “rational choice theory”) among social scientists in the 1980s. The reason for this can be summed up in two words (and an article): the prisoner’s dilemma. Social scientists had always been aware that individuals in groups are capable of getting stuck in patterns of collectively self-defeating behavior. Paul Samuelson