John Karlsrud is senior research fellow and manager for the Training for Peace program at the Norwegian Institute of International Affairs (NUPI), and external associate at the Centre for the Study of Globalisation and Regionalisation, University of Warwick, where he also earned his PhD. He has been a Fulbright fellow at the Centre on International Cooperation, New York University (NYU), and a visiting fellow at the International Peace Institute, New York. John works on peacekeeping, peacebuilding, and humanitarian issues. Books include Norm Change in International Relations (Routledge, 2016), and The Future of African Peace Operations: From the Janjaweed to Boko Haram (Zed Books, 2016, co-edited with Cedric de Coning and Linnea Gelot). Yf Reykers is a post-doctoral research fellow at the Leuven International and European Studies Institute at KU Leuven, Belgium, where he also obtained his PhD in 2017. He has been a visiting scholar at the Center on International Cooperation at NYU and at Aarhus University. His research focuses on multinational military operations. He studies issues relating to the accountability of military interventions, rapid response mechanisms, and inter-organizational relations. His work has been published in journals including Contemporary Security Policy, European Security, International Peacekeeping, and Parliamentary Affairs.