In original essays written by both senior scholars as well as rising younger scholars in the field of international ethics, this volume addresses the ethics of war in an era when nonstate actors are playing an increasingly prominent role in armed conflict. Central to this concern is the issue of whether, or under what conditions, nonstate actors can be said to have the "authority" to participate in war. The contributors therefore explore and analyze the problems with, and possibilities for, incorporating nonstate actors into the traditionally statecentric moral vocabulary about war-namely,...