[The following commentary was originally published by the Toda Peace Institute, and is reprinted here with permission.]
The Treaty on the Prohibition of Nuclear Weapons (TPNW) entered into legal force on 22 January 2021. It is the first multilateral nuclear disarmament treaty to be negotiated in 25 years (since the Comprehensive Nuclear-Test-Ban Treaty, CTBT) and the first such treaty to enter into force in 49 years (since the Seabed Treaty which prohibits weapons of mass destruction including nuclear weapons being placed on the seabed).
The TPNW is here to stay and is a game-changer. It provides the first comprehensive and categorical prohibition of the worst weapons of mass destruction, the only weapons which pose an acute existential threat to humans and planetary health.
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