Religion is a major aspect of human life that directly intersects with a number of social policy issues. Although much has been written about the religion-social policy nexus, the literature remains overly fragmented. Focusing primarily on Western Europe and North America, this review essay seeks to create a fruitful dialogue among the three main streams of research in the area, which respectively that focus on political parties, faith-based organisations, and individual behaviour. This essay has the goal of formulating a new, integrated agenda for future research on the religion and social policy nexus that also extends beyond Western societies.