Abstract

Collectivist accounts of the ethics of war have traditionally dominated just war theory (Kutz 2005; Walzer 1977; Zohar 1993). These state-based accounts have also heavily influenced the parts of international law pertaining to armed conflict. But over the past ten years, reductive individualism has emerged as a powerful rival to this dominant account of the ethics of war. Reductivists believe that the morality of war is reducible to the morality of ordinary life. War is not a special moral sphere with its own special moral rules. Reductivists typically reject a collectivist approach to the morality of war in favor of an individualist view, according to which individuals (rather than states or other collectives) are the proper focus of moral guidance and evaluation. This view holds that the rules governing killing in war are simply the rules governing killing between individuals, most obviously the rules of self-defense and other-defense (Fabre 2009; Frowe 2014; McMahan 2009; Tadros 2014). This chapter defends reductive individualism against the claim that it is unable to sanction wars of national defense that seek to protect non-vital interests. These non-vital interests include political goods such as the defense of sovereignty—that is, of political and territorial integrity.