Nuclear Weapons Ban Treaty

Photo: Aude Catimel/ICAN

The Treaty on the Prohibition of Nuclear Weapons

The tides are turning. On July 7, 2017, the U.N. adopted the first-ever treaty imposing a comprehensive prohibition against nuclear weapons.

Inspired by past efforts that led to bans on antipersonnel land mines and cluster bombs, the treaty reframes nuclear disarmament as a global health imperative and provides a vision for a nuclear weapons-free world.

With more than 120 nations in support of the treaty, it firmly places nuclear weapons states as pariahs in the international system. The nine nuclear-armed countries did not participate in negotiations and opposition to the ban can be confined to those states and those within their “umbrella”. It is worth noting no countries in South America or Africa opposed the treaty.

The International Campaign to Abolish Nuclear Weapons (ICAN) mobilized civil society across more than 100 countries to create the political momentum at the U.N. to achieve the treaty. ICAN won the 2017 Nobel Peace Prize for raising awareness on the humanitarian impact of nuclear weapons. PSR’s global affiliate, International Physicians for the Prevention of Nuclear War (IPPNW), founded ICAN in 2007. PSR is a proud U.S.-partner of ICAN.

About the Nuclear Weapons Ban Treaty

On July 7, 2017, the U.N. adopted the Treaty on the Prohibition of Nuclear Weapons (TPNW), which comprehensively prohibits nuclear weapons and related activities. The medical community’s advocacy and research helped civil society and the international community devise public health solutions to the threat of nuclear weapons.

Ban Treaty at a Glance

September 2017

Quick guide to the Treaty on the Prohibition of Nuclear Weapons approved by the U.N. on July 7, 2017.

ICAN/Clare Conboy

Photo: Clare Conboy/ICAN

By The Numbers

70

nations have ratified the nuclear weapons ban treaty

Ban Treaty Signatories

The Treaty on the Prohibition of Nuclear Weapons entered into force on January 22, 2021 after Honduras ratified the treaty, becoming the 50th nation to do so.

0

nuclear states have ratified the nuclear weapons ban treaty

Nuclear-Armed Nations

Neither the U.S. nor any of the other 8 nuclear-armed states have supported the treaty. Activists in the U.S. are pushing for recognition.

Photo: Clare Conboy/ICAN