Nina Græger is Senior Research Fellow at the Norwegian Institute of International Affairs (NUPI) and was Adjunct Professor II in International Relations at the Norwegian University of Life Sciences from 2013 to 2017. Græger has published extensively on security, defence, international organisations, Nordic and Norwegian foreign policy and practice theory. Her work has appeared in Security Dialogue, Journal of Peace Research, Cooperation and Conflict, Cambridge Review of International Affairs, Journal of European Integration, The Hague Journal of Diplomacy, Global Change, Peace & Security and Global Affairs. She is the author of Norwegian Defence Policy. Territorial Defence and International Operations 1990-2015 (2016, in Norwegian) and co-editor of EU-NATO relations: Running on the Fumes of Informed Deconfliction (Routledge, 2019). Halvard Leira is Senior Research Fellow at the Norwegian Institute of International Affairs (NUPI). He has published extensively in English and Norwegian on international political thought, historiography, foreign policy and diplomacy. His work has appeared in e.g. Review of International Studies, Millennium, Leiden Journal of International Law, International Studies Perspectives, The Hague Journal of Diplomacy, Global Society and Cooperation and Conflict. Leira is co-editor of International Diplomacy (2013) and History of International Relations (2015), and the forthcoming Routledge Handbook of Historical International Relations.