Justin Massie is a professor and Head of the Department of political science at the Université du Québec à Montréal. He is also Co-director of the Network for Strategic Analysis, and Co-director of Le Rubicon. He was the 2019 Fulbright Visiting Research Chair in Canada-U.S. Relations at Johns Hopkins University’s School of Advanced International Studies (SAIS) in Washington, DC. His research focuses on the global power transition, multinational military interventions, and foreign and defence policy. His work has been published in several journals, including International Studies Quarterly, European Journal of International Security, International Relations, Foreign Policy Analysis, Contemporary Security Policy, Comparative Strategy, Canadian Journal of Political Science, International Journal (winner of the best article published in 2017), Canadian Foreign Policy Journal (winner of the best article published in 2008) and Études internationales (winner of the best article published in 2011). He is the author of Francosphère : l’importance de la France dans la culture stratégique du Canada (PUQ, 2013), and co-editor of Paradiplomatie identitaire : Nations minoritaires et politique extérieure (PUQ, 2019), America’s Allies and the Decline of U.S. Hegemony (Routledge, 2019), and Intelligence Cooperation in a Multipolar World: Non-American Perspectives (UTP, 2024).