When the Cold War ended, the United States was in a remarkable position of primacy: far and away the world's most powerful country. Yet it was also on good terms with most of the world's major powers. Despite these advantages, its foreign policy record since then is mostly one of disappointments and sometimes costly failures. These difficulties are partly due to America's structural position in the international system, but they also reveal some recurring weaknesses in America's foreign policy establishment and its overall approach to foreign affairs. Stephen M. Walt, Robert and Renee Belfer Professsor of International Affairs, discussed these issues with a Q+A session following his address.