This paper presents progress to date on a review examining how marriage and relationship programs–defined as programs to improve the relationship between two people involved romantically–affect the quality of couples’ relationships. This is an important issue given changes in the past several decades in marriage and divorce rates, the rise of single parenting, and the effects these changes may have on children and adults. Here, the authors briefly review these changes and their effects, describe several interventions that address the problem, and discuss the past research on these interventions as well as the work we propose for this systematic review. (Author abstract)