On 7 July 2017 – following a decade of advocacy by the International Campaign to Abolish Nuclear Weapons (ICAN) and its partners – an overwhelming majority of the world’s nations adopted a landmark global agreement to ban nuclear weapons. It entered into force on 22 January 2021. In this talk with Claire Yorke, expert on empathy and international security and convenor of the GCC's working group on International Relations, Daniel Hogsta - Interim Director of ICAN - will talk about how the treaty was won, the lessons he learned, and why peace is always possible.