The UN Treaty on the Prohibition of Nuclear Weapons is now open for signature, but what real-world effects will it have on nuclear disarmament and international security more generally between now and 2030? Will the treaty succeed in mobilizing popular opposition to nuclear weapons in nuclear-armed states and their allies, as its proponents hope and its opponents fear? If so, which states will feel this impact and what will the consequences be? Conversely, is it possible that the treaty will actually backfire by causing the friends and allies of nuclear-armed states to reject the ban, as Switzerland has done? Alternatively, might the treaty end up having little impact either way?


Steven Miller, Belfer Center for Science and International Affairs


Rebecca Johnson, Acronym Institute for Disarmament Diplomacy

George Perkovich, Carnegie Endowment for International Peace

Nicolas Roche, French Ministry of Foreign Affairs

María Antonieta Jáquez, Mission of Mexico to the United Nations