This course introduces the fundamental concepts and problems of public international law. What are the origins of international law? Is international law really law? Who is governed by it? How are treaties interpreted? What is the relationship between international law and domestic law? We examine the interplay between law and international politics, in particular with reference to international human rights, humanitarian law, the use of force, and international criminal prosecutions. No prior knowledge of international law is required. While the topics are necessarily law-related, the course will assume no prior exposure to legal studies.