The laws governing humanitarian action stand at the intersection of several fields of international law, regional agreements, soft law and domestic law. Through in-depth case studies and analyses, expert scholars and practitioners come together to offer interdisciplinary approaches which include contributions from legal policy, international relations and philosophical perspectives. Providing invaluable overviews and insights, this collection of essays sheds light on the subject and makes sense of the various elements involved to elucidate the foundations of law and policy of humanitarian action.