Abstract

In this paper, we claim that Jesus’ command “Love your enemies” is compatible with the fact that (1) for a group of Cooperators and Defectors repeatedly playing the Prisoner’s Dilemma game with each other, Defection will be the dominant strategy, and (2) the Tit-For-Tat strategy, a variant of the Eye-For-Eye principle that Jesus refuted in his Sermon on the Mount, had won Robert Axelrod’s tournaments of Iterated Prisoner’s Dilemma game in the 1980s. By incorporating relevant biblical commands into an informed cooperative strategy, we find that it itself is a strong contender in a secular world of social evolution.