Project summary: Hybrid Practices of Diplomacy and Warfare (DIPLOWAR) is a transdisciplinary research project that will shed light on the changing relationship between diplomacy and warfare. An important analytical move of the project is to understand diplomacy and warfare not primarily as political or legal relations between states, but as structuring principles of peaceful and violent political practices. This reconceptualization makes it possible to bring together insights from research on the "new diplomacy" and research on the "new wars", two literatures that have not yet been systematically linked to each other. Through two explorative studies of foreign policy decision-making processes in the United States and (West) Germany from 1945 to the present, the project will trace how practices of diplomacy and warfare, which were previously clearly separated, have increasingly formed hybrid constellations. DIPLOWAR seeks to both sharpen our analytical vocabulary and deepen our empirical understanding of these processes of hybridization to help scholars, practitioners, and the public to better grasp the new realities of war and peace. The first phase of the project will be hosted by the Arnold A. Saltzman Institute for War and Peace Studies at Columbia University in the City of New York, the second by the Cluster of Excellence "The Formation of Normative Orders" at Goethe University Frankfurt.