Since its inauguration after the devastation of the Second World War, the WCC has considered promotion of peace as inseparable from international, regional, and national measures for disarmament. It raises ecumenical concerns and advocates at various levels of national and international governance for nuclear disarmament, control of the spread of other weapons of mass destruction, accountability under the international rule of law, and fulfilment of treaty obligations.
Over the last 70 years, churches have come together to speak out against the destruction caused by all manner of weapons, and to advocate for complete prohibitions or restrictions on their use. A Treaty on the Prohibition of Nuclear Weapons (TPNW) has recently been adopted, but faces strong opposition from states who believe they need these weapons for their own security. Other critical areas include light weapons, autonomous weapons systems, and landmines.
The WCC advocates on these issues, working with churches to create movements in their own countries to educate citizens about the dangers of these weapons and to call upon their own governments to disarm.