The five nations that this treaty involved are: Washington, D.C.. US; Moscow, Russia; London. UK and 40 other signature states, Its three pillars are:
1, non-proliferation nuclear devices
3, right to peaacful use of nuclear technology such as energy and fuel
United Nations Security Commission includes U.S., U.K..France, China and Soviet Union. In 1995 N.P.T. extended the treaty to more countries. Since August 2016, 191 states are added to this quintessential treaty for a nuclear free environment that affects every person on Earth. It was presidents Reagan and Obama who endorsed a non-nuclear weapons policy.
World Enlighten News, W.E.N.