Justin Massie is Full Professor of Political Science at the Université du Québec à Montréal and Director of the Network for Strategic Analysis. He is also Co-Director of the Le Rubicon platform. He previously held the Fulbright Research Chair in Canada–U.S. Relations at the Paul H. Nitze School of Advanced International Studies (SAIS), Johns Hopkins University, and was a Visiting Professor at Paris-Panthéon-Assas University. His research focuses on how allied countries are adapting their defence policies in response to the resurgence of high-intensity warfare and the relative disengagement of the United States. He has published more than 40 peer-reviewed articles in journals such as International Studies Quarterly, International Relations, Foreign Policy Analysis, Contemporary Security Policy, Defense and Security Analysis, and Comparative Strategy. 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).
Expertise
- International Security and Armed Conflicts
- Defence Policy
- Military Interventions
Selected Publications
- Walter Rauti & Justin Massie, “Alliance Integration and Defence Industrial Resilience in Italy and Canada,” Defence & Security Studies (2026).
- Justin Massie $ Barbora Tallová, “Friends in Need, Friends Indeed? Explaining Variation in Military Support to Ukraine,” European Journal of International Security (2025).
- Justin Massie & Barbora Tallová, “Suckers and Free Riders: The Determinants of Military Burden-Sharing in the Russo-Ukrainian War,” Contemporary Security Policy (2025).
- Philippe Lagassé & Justin Massie, “Canada’s Un-strategic Defence Policy,” in Norman Hillmer, Philippe Lagassé & Vincent Rigby (eds.), Canada Among Nations 2023: Twenty-First Century National Security, Palgrave Macmillan, 2024 : 143-163.
- Thomas Juneau, Justin Massie & Marco Munier (eds.), Intelligence Cooperation in a Multipolar World: Non-American Perspectives, University of Toronto Press, 2024.
- Justin Massie, Jonathan Paquin & Kamille Leclair, “Contested Strategic Cultures: Anglosphere Participation in the Coalition Against the Islamic State,” International Studies Quarterly 67:2 (2023).
- Justin Massie & Jonathan Paquin (eds.), America’s Allies and the Decline of U.S. Hegemony (Routledge, 2019).
- Justin Massie, “Why Canada Goes to War: Explaining Combat Participation in U.S.-led Coalitions,” Canadian Journal of Political Science 52:3 (2019): 575-594.























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