This course will focus chiefly on the crimes for which individuals incur direct criminal liability under contemporary international law. We will study (i) what crimes qualify as international in this sense, general principles of international criminal jurisdiction and immunities, and the historical evolution of the field from its genesis after World War I to Nuremberg to the permanent International Criminal Court established in 2002; (ii) statutory and tribunal jurisprudence defining the nature and scope of liability for core international crimes, viz., genocide, crimes against humanity, and war crimes; (iii) modern debates over other, at times more controversial, international crimes, in particular, torture and CIDT, aggression, and terrorism; (iv) the minimal requirements and forms of individual criminal responsibility under international law; and (v) selected defenses. Time permitting, we may also cover selected issues in the transnational cooperation and prosecution of crimes that transcend national borders, such as money laundering and human trafficking.