The Treaty on the Prohibition of Nuclear Weapons (TPNW) was negotiated at the United Nations in New York in March, June, and July 2017, with the participation of more than 135 countries, the International Committee of the Red Cross, and members of civil society. On 7 July 2017, 122 states voted in favour of the Treaty’s adoption. It opened for signature on 20 September 2017 and after receiving 50 ratifications, the TPNW entered into force on 22 January 2021.