Nuclear Non-proliferation Treaty at fifty: a midlife crisis

On 1 July 1968, the Treaty on the Non-proliferation of Nuclear Weapons (Nuclear Non-proliferation Treaty, or NPT) was opened for signature. Since then, the Treaty has become a cornerstone of international efforts to prevent the spread of nuclear weapons, to eventually eliminate them and to facilitate peaceful use of nuclear energy. With the adherence of 190 countries, the NPT is close to universal world participation. In 1995 the Treaty was extended indefinitely, after its initial period of 25 years. The NPT remains unique as there is no other international agreement…

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