On December 10 in Oslo, the International Campaign to Abolish Nuclear Weapons (ICAN) was awarded the Nobel Peace Prize. ICAN started as a grassroots campaign in 2007. Its aim was to shift the paradigm of discussion about nuclear weapons from security and deterrence to the environmental and humanitarian effects of nuclear explosions. As the prize demonstrates, ICAN has succeeded brilliantly. But, as ICAN acknowledges, this is still only the beginning of the end of nuclear weapons.