Abstract
Debates about Catholic social doctrine often revolve around whether a given theory or practice is compatible with the magisterium or not. There is a body of scholarly literature on the nature and scope of the magisterium, but little has been written on the magisterium as it pertains to social doctrine. This essay explores what magisterial documents and scholarship say about the sources, levels, and scope of the magisterium in relation to social doctrine. It then considers how the levels of magisterium can help the faithful understand contemporary teaching on capital punishment. The better they understand the magisterium in relation to social doctrine, the more charitable and fruitful debate will be.