The 20th century witnessed a vast proliferation of conceptions of sin in Christian thought. One hallmark thereof has been an increased emphasis on the non-individualistic dimensions of human sin. It is suggested here that there have been two primary types of rejections of individualism in doctrines of sin in the last half-century, the structural sin type and the relational self type. The book concludes with recommendations drawn from the preceding analyses for further understanding of the social dimensions of sin: the need for clarifying the agential status of a social structure; the moral culpability of a relational self; and a call to integrate the structural sin and relational self types into a future doctrine of social sin.