The principle of subsidiarity is perhaps one of the most crucial and most misunderstood in Catholic social teaching. According to the principle, decisions should be made at the lowest level possible and the highest level necessary. Subsidiarity is crucial because it has applications in just about every aspect of moral life. In medical ethics, subsidiarity helps guide decision-making. In social ethics, subsidiarity helps us prudentially judge not only decision-making but allocation of resources. Subsidiarity is an effort at balancing the many necessary levels of society – and at its best, the principle of subsidiarity navigates the allocation of resources by higher levels of society to support engagement and decision making by the lower levels. Despite how often it is stated – subsidiarity does NOT mean smaller is better.