Bruno Tertrais is Deputy Director of the Fondation pour la Recherche Stratégique (FRS), France's leading think tank on strategic issues, and an Associate Expert at the Institut Montaigne. His areas of expertise include geopolitics and international relations, defence and security, and demographic issues. Latest publications: Pax Atomica? Theory, practice and limits of deterrence (Ed. Odile Jacob, 2024) ; The Atlas of Borders: Walls, Migration, Conflicts (Les Arènes, 2024); The Israeli Question (Ed. de l'Observatoire, 2025); War of the Worlds: The Return of Geopolitics and the Clash of Empires (Alpha, new edition, 2025).