International norms do not exist in isolation. They fit together in intricate patterns called “normative orders.” This chapter discusses two types of international normative order: permissive and restrictive. The former contains a broad conception of what is appropriate in foreign policy, maintaining that statecraft cannot be evaluated with the same moral criteria used to judge the behavior of people in their daily lives. The latter limits when it is justifiable to wage war, proscribing the practices of realpolitik that espouse wielding force without compunction.