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The year of Futuribles’ birth—1975—was also the year of the first ‘summit of the industrialized countries’, which inaugurated what was to become a regular occurrence: a meeting between the heads of state of the biggest economic powers (G7, G20). These meetings complement those within the multinational arenas established after 1945 (United Nations, Atlantic Alliance etc.), though they offer a less institutional framework (with no specialized administrative structure). This was a time of peak multilateralism in what was, admittedly, a context of Cold War, but also of increasing globalization, something which would be further accentuated, from the 1990s onwards, after the disappearance of the Communist bloc. For three decades, a situation of relative peace and stability was to follow, against a background of international dialogue and coordination maintained in good times and bad. In 2025 things have changed substantially, with, among other things, Russia’s invasion of Ukraine bringing war to European soil again; Hamas’s terrorist attack and Israel, in violation of international law, responding with the almost total destruction of the Gaza Strip; a protectionist pullback by the USA against a background of rivalry with China; and the emergence of a ‘post-truth’ era, not to mention economic neo-colonialism. The international scene and existing alliances are being completely refashioned and the multilateral arenas in which international issues were previously discussed seem to be losing even what little effectiveness they had. Is there any chance that the World Trade Organization, the international organizations under the UN umbrella, the International Criminal Court and similar institutions will recover sufficient influence and legitimacy to foster a renewal of constructive dialogue between states? To find answers on these topics, we interviewed Guillaume Devin, a political scientist and Professor Emeritus at Sciences Po and an associate researcher at its Center for International Studies. As a specialist in the sociology of international relations, multilateral diplomacy and international organizations, he is the author of several reference works on the subject and also the founder of the GRAM (Multilateral Action Research Group).