Once something is invented, it cannot be “uninvented”. This is a very simple fact that you can’t ignore. Another, equally simple fact, is that there will always be ambitious and power hungry leaders. The natural product of these two facts is that these leaders will always strive to achieve the ultimate power that is a nuclear bomb. They may do so publicly or covertly, but they will attempt to acquire the bomb. It is naive to believe the smaller powers in the world will forgo building the bomb in exchange for humanitarian aid, or not being attacked by the greater powers. It is equally naive to believe the powers that currently have stockpiles of the bomb will ever get rid of all their bombs. The distrust and deception of the cold war should show you that despite any outward appearances of complete disarmament, neither power would risk giving up all their bombs only to find the other power lied and hid a few. Mutual distrust would insure that some bombs were hidden as an insurance policy. That alone makes a nuclear free world a myth)
I was born a year before the Berlin wall fell. I never grew up in a world where the threat of instant and total destruction was possible at any moment. I guess it’s still possible now, but it’s so unlikely that I never even think about it. There are so many other problems in the world that are actually happening for me to waste my time worrying about such a remote possibility like a nuclear war. The interesting thing about nuclear weapons is that they make themselves obsolete. I’m sure you’ve heard of M.A.D., or Mutually Assured Destruction. If you haven’t, the name pretty much gives it away. If you attack us with nuclear weapons, we attack you. We both die, so there is no point in attacking with those weapons. In order for MAD to work, you need to have a nuclear weapon hidden somewhere, and the ability to deliver it to the enemy quickly. The US currently has this in the form of missile silos and a handful of submarines hidden out under the oceans, each with enough warheads to destroy an entire continent.
MAD works for keeping countries from fighting a nuclear war, but it does not work so well for the new threat: religious fanatics. How do you fight people who gladly die, who gladly strap bombs onto their bodies? They have no capital you can capture, no government to negotiate with. They will actively seek to acquire the nuclear bomb in order to carry out what they believe to be their god’s will. MAD does not deter them, even if you threaten to annihilate the country they came from. That problem is indifferent to whether or not you get rid of your stockpile of nuclear weapons. But I digress, the main point is that nuclear weapons are hear to stay. They always will be, and leaders will always try and get them. Lowering the nuclear stockpiles of the world’s major powers is all well and good, but it doesn’t accomplish much. As long as you have the ability to kill everything on the planet, it doesn’t matter how many times over you can do it.