Mutual Assured Destruction.
S.A.L.T.
S.T.A.R.T
New S.T.A.R.T
UN IAEA which prohibits nations making nuclear weapons (hence all the anger at North Korea)
Every measure has been made to reduce the number of nuclear weapons from increasing and more importantly from nations from having them, but MAD ensures that nobody who does is foolish enough to use them against another. Russia annexed Crimea without using them, what stopped them? MAD.
I really don't understand the last bit, but the whole post is rendered redundant by May not fulfilling treaty obligations on talking about disarmament.
http://www.independent.co.uk/news/u...s-mp-reckless-irresponsible-123-a7631546.html