As for total disarmament, there are almost 50,000 nuclear weapons in the world today; even if they were banned, not all would be destroyed.
New developments in weapon systems during the 1950s and early 1960s created a situation that was most dangerous, and even conducive to accidental war.
Nuclear weapons are intrinsically neither moral nor immoral, though they are more prone to immoral use than most weapons.
The objective of nuclear-weapons policy should not be solely to decrease the number of weapons in the world, but to make the world safer - which is not necessarily the same thing.