This paper surveys the most important recent debates within the ethics of war. Sections 2 and 3 examine the principles governing the resort to war (jus ad bellum) and the principles governing conduct in war (jus in bello). In Section 4, we turn to the moral guidelines governing the ending and aftermath of war (jus post bellum). Finally, in Section 5 we look at recent debates on whether the jus ad bellum and the jus in bello can be evaluated independently of each other.
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