When is war just? What does justice require? If we lack a commonly-accepted understanding of justice - and thus of just war - what answers can we find in the intellectual history of just war? Miller argues that just war thinking should be understood as unfolding in three traditions: the Augustinian, the Westphalian, and the Liberal, each resting on distinct understandings of natural law, justice, and sovereignty. The central ideas of the Augustinian...