Abstract

There has been a recent revival of interest in the medieval just war theory. But what is the virtue of justice needed to make war just? War is a complex and protracted activity. It is argued that a variety of virtues of justice, as well as a variety of virtues are required to guide the application of the use of force. Although it is mistaken to regard war as punishment, punitive justice—bringing to account those guilty of initiating an unjust war or of war crimes in its conduct— has an important role to play after conflict to restore the wrongs of war and help establish a just peace. Justice as fairness is needed to guide the distribution of resources and so reduce the grounds for war. Protective justice—protecting a community or innocents from harmful attack—helps define what constitutes a just cause for war and so constrains the occasions for war. The just principles set out the criteria to be met if war is to be morally permissible. In practice, this challenging demand requires that political leaders and military at all levels learn and exercise the virtues, particularly the cardinal virtues of justice, courage, self-control and practical wisdom. If we are to make war just and to make only just war, we need justice understood in its broadest sense. Such justice, as Aristotle noted, “is not a part but the whole of virtue.”