On 22 January, the Treaty on the Prohibition of Nuclear Weapons (TPNW) entered into force. This marks an incredible achievement for activists and movements committed to ridding the world of these abhorrent and destructive weapons.
What this shows is the power of a moral ideal to ignite public imagination and mobilise action.
There are lessons here for climate activists.
The TPNW came after decades of trying to get the nuclear powers to fulfil their commitments under the…