This course is an introduction to the study of international relations. It first provides students with the analytical tools and concepts necessary to understand and explain the interactions of states and other actors in the international system. It then explores some of the most pressing political problems and challenges in the modern international system. The course will discuss issues such as the importance of power in the international system, the origins of war and peace, the challenges of the new global economy, security and terrorism, and the implications of these trends for the 21st century. This is required for the major. Prerequisite: sophomore standing or PSCI 101Y. Offered every year.