Poston Abstract Abstract: Social evil is any pain or suffering brought about by game-theoretic interactions of many individuals. This paper introduces and discusses the problem of social evil. I begin by focusing on social evil brought about by game-theoretic interactions of rational, moral individuals. The problem social evil poses for theism is distinct from problems posed by natural and moral evils. Social evil is not a natural evil because it is brought about by the choices of individuals. But social evil is not a form of moral evil because each individual actor does not misuse his freewill. Traditional defenses for natural and moral evil fall short in addressing the problem of social evil. The final section of this paper discusses social evil and virtue. I argue that social evil can arise even where virtue is lacking. Further, I explore the possibility of an Edwardsian defense of social evil that stresses the high demands of true virtue. The conclusion of this paper is that social evil is problematic and provides a new ground for exploring the conceptual resources of theism.