Actors in international politics need to navigate a host of ethical challenges when deciding how to act in a certain context. They are confronted by the question: "What, from an ethical point of view, should I do?" with regard to a wide range of issues including the conduct of war, the just distribution of aid and trade, human rights, the care of the global environment, the rights of asylum seekers and refugees, genocide, money laundering, global terror, and many others. This collection looks at classical and seminal research in the field with the broad framework of the moral standing of states; the moral standing of non-state actors; and the ethics of international relations. Volume One: The Society of States Volume Two: Global Civil Society: Non-State Actors in World Politics Volume Three: The Changing Constitution of Global Politics Volume Four: Ethics and Foreign Policy