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New Developments in International Treaties on Nuclear Weapons: the NPT and the TPNW

November 14, 2022 @ 1:00 pm - 2:30 pm EST

The 2017 Treaty on the Prohibition of Nuclear Weapons (TPNW), also known as the Nuclear Ban Treaty, went into force in January 2021. The treaty was negotiated with the purpose of strengthening the largely unimplemented disarmament pillar of the 1968 Treaty on the Non-Proliferation of Nuclear Weapons (NPT). The NPT has been signed by all but four nations. The Nuclear Ban Treaty has been signed by 91 nations and ratified by 68, none of which are nuclear weapon states. This August saw the completion of the tenth NPT review conference, a meeting held between the parties to the Treaty to review its progress. The conference exposed a rift between the nuclear weapon states and the non-nuclear weapon states on the lack of progress toward the NPT disarmament requirement. In this webinar, we will cover these recent developments, as well as the significance of, and the issue of compatibility between the NPT and TPNW.


  • Zia Mian is a physicist and co-director of Princeton University’s Program on Science and Global Security. He made presentations at the August 2022 NPT Non-Proliferation Treaty (NPT) Review Conference and at the first meeting of States Parties to the Treaty on the Prohibition of Nuclear Weapons (TPNW) in June.
  • Randy Rydell is a former Senior Political Affairs Officer for the UN’s High Representative for Disarmament Affairs and a staff member working on nonproliferation in the United States Senate. Since his retirement in 2014, he’s served as an Executive Advisor to Mayors for Peace, managed by the Hiroshima Peace Culture Foundation.
  • Ray Acheson has been providing analysis on arms control diplomacy at the United Nations and other international forums for over a decade as the head of Reaching Critical Will, the disarmament program at the Women’s International League for Peace and Freedom. They are currently a visiting researcher at Princeton’s Program on Science and Global Security and a steering group member of the International Campaign to Abolish Nuclear Weapons (ICAN).


November 14, 2022
1:00 pm - 2:30 pm EST
Event Category:


Physicists Coalition for Nuclear Threat Reduction