Nuclear war is such an emotional subject that many people see the weapons themselves as the common enemy of humanity.
New developments in weapon systems during the 1950s and early 1960s created a situation that was most dangerous, and even conducive to accidental war.
The widespread diffusion of nuclear weapons would make many nations able, and in some cases also create the pressure, to aggravate an on-going crisis, or even touch off a war between two other powers for purposes of their own.
World War I broke out largely because of an arms race, and World War II because of the lack of an arms race.
Anything that reduces war-related destruction should not be considered altogether immoral.
For some years I have spent my time on exactly these questions - both in thinking about ways to prevent war, and in thinking about how to fight, survive, and terminate a war, should it occur.
In 1960 I published a book that attempted to direct attention to the possibility of a thermonuclear war, to ways of reducing the likelihood of such a war, and to methods for coping with the consequences should war occur despite our efforts to avoid it.
From a scientific perspective there is some indication that a nuclear war could deplete the earth's ozone layer or, less likely, could bring on a new Ice Age - but there is no suggestion that either the created order or mankind would be destroyed in the process.