There is a widening divide between the data tools and knowledge that international relations scholars produce and what policy practitioners find relevant for their work. In this firstofitskind conversation leading academics and practitioners reflect on the nature and size of the theorypractice divide. They find the gap varies by issue area and over time.The essays in this volume use data gathered by the Teaching Research and International Policy TRIP Project over a fifteenyear period. As a whole the volume analyzes the structural factors that affect the academys ability to influence policy across issue areas and the professional incentives that affect scholars willingness to attempt to do so. Individual chapters explore these questions in the areas of trade finance human rights development environment nuclear weapons and strategy interstate war and intrastate conflict. Each substantive chapter is followed by a response from a policy practitioner providing their perspective on the gap and the possibility for academic work to have an impact.Bridging the TheoryPractice Divide in International Relations provides concrete answers and guidance about how and when scholarship can be policy relevant.