Some have suggested that if Ukraine had retained their nuclear weapons, Russia would not have invaded and captured Crimea. This is absurd. There is no evidence that nuclear weapons have ever deterred an invasion or won a war. …….

Suggestions that Ukraine has become more vulnerable because it gave up nuclear weapons are support for nuclear proliferation. Does this mean that every nation needs to have nuclear weapons to prevent invasion? Putin did not invade Belarus or Kazakhstan, and they have no nuclear weapons. Rather than re-arming nations, we have to go the other way to make the world safe for ourselves and future generations…….

Immediate American and Russian reductions to the same nuclear arsenal sizes of the other nuclear nations, about 200 weapons each, would maintain the nuclear deterrence of each and prevent nuclear winter from ever happening. Nuclear abolition will prevent nuclear famine, the horrendous consequences on food of even a “small” nuclear war using less than 1 percent of the current global arsenal. Nuclear weapons are already stigmatized, and no sane person would consider using them. As we move toward their reduction and elimination, we will not prevent all human conflict, but we will lessen their potential horrific consequences.http://www.huffingtonpost.com/alan-robock/ukraine-and-nuclear-weapo_b_5014360.html