That question came up in the first class of the course I am taking this fall at theMcGill Institute for Learning in Retirement. Sadly, the consensus was that nuclear disarmament, as a practical matter, is just not on. Countries, like the U.S. and China, will not reduce their stockpiles of weapons that can, if used, incinerate the world. What’s more, chances are countries like Iran are likely to obtain nuclear weapons and so will terrorist organizations. The only hope expressed was that people the world over, if threatened with nuclear annihilation, will rise against their own rulers and armed forces themselves will turn against their masters. It’s a long shot, it seems to me.