The Nobel Peace Prize conferred on the International Campaign to Abolish Nuclear Weapons (ICAN) is equally a recognition for the 122 countries that backed the 2017 UN treaty this summer to ban the bomb. The fact that it has taken over seventy years to codify the UN General Assembly 1946 goal to eliminate atomic weapons from national armaments is a measure of the significance of this years prize. Today, the terms of the anti-nuclear debate encompass larger issues of environmental destruction, in conjunction with the catastrophic humanitarian consequences of a potential holocaust. ICANs emphasis on this latter dimension, an aspect underscored by the Nobel committee in Norway, marks a departure of sorts in the nuclear discourse. To appreciate it, one merely has to draw a comparison with the preoccupations of the peace movement during the years of the Cold War. The emphasis then was principally on the grave danger from serious miscalculations, stemming from mutual threat perceptions between the U.S. and the USSR. The committee has also lauded ICANs endeavours to fill the legal gap through its leadership on the adoption of the Treaty on the Prohibition of Nuclear Weapons. With cluster munitions, land mines and chemical and biological weapons having been banned, nuclear weapons remained the last category of weapons of mass destruction that had not been outlawed. ICANs emphasis on the humanitarian consequences of nuclear destruction have global support for the new treaty. Notable is the perception that the sheer magnitude of destruction wrought by any nuclear strikes would amount to crimes against humanity. A catalyst to this process was the stricture that the use of nuclear arms had to be compatible with humanitarian law.