Paul D. Williams is Professor and Associate Director of the Security Policy Studies MA Program in the Elliott School of International Affairs at the George Washington University. His most recent publications include Fighting for Peace in Somalia: A History and Analysis of the African Union Mission (AMISOM), 2007-2017 (Oxford University Press, 2018); War and Conflict in Africa (Polity Press, 2nd edition, 2016); and Understanding Peacekeeping, with A.J. Bellamy (Polity Press, 3rd edition, 2021).

Matt McDonald is Reader in International Relations at the School of Political Science and International Studies at the University of Queensland. His most recent publications include Ecological Security (Cambridge University Press, 2021); Ethics and Global Security: A Cosmopolitan Approach, with Anthony Burke and Katrina Lee-Koo (Routledge, 2014); and Security, the Environment and Emancipation (Routledge, 2012).