Judith Reppy is a long-time member of Cornell’s Peace Studies Program, which in 2010 was renamed the Judith Reppy Institute for Peace and Conflict Studies (PACS) to mark her retirement. In this conversation with Matthew Evangelista, she describes the early history of the Peace Studies Program and the challenges it faced in defining its place in the university during the contentious years of the early 1970s. The conversation also touches on later developments in the Program, as it broadened its field of reference beyond its early focus on arms control and nuclear weapons, and the further changes in response to the end of the Cold War and the aftermath of 9/11.