Patrick A. Mello is Assistant Professor of International Security at Vrije Universiteit Amsterdam. His most recent book is Qualitative Comparative Analysis: An Introduction to Research Design and Application (Georgetown University Press, 2021) and he has published, among other journals, in the European Journal of International Relations, Foreign Policy Analysis, and the European Political Science Review.

Falk Ostermann is Lecturer at Kiel University. He studies the domestic contestation of foreign policy with a focus on military interventions. He is the author of Security, Defense Discourse and Identity in NATO and Europe. How France Changed Foreign Policy (Routledge, 2019) and of Die NATO (UVK/UTB, 2020). He has published, among others, in the European Political Science Review, Foreign Policy Analysis, or West European Politics.