The Non-Proliferation Treaty: Fifteen years after entry into force Not Available 98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; NON-PROLIFERATION TREATY; EVALUATION; GLOBAL ASPECTS; UNITED NATIONS; 350101; TREATIES The need to halt a wider spread of nuclear weapons grew out of the realization that the increase in the number of countries possessing such weapons would increase the threat to world security. As the Treaty on the Non-Proliferation of Nuclear Weapons clearly states in its preamble, the proliferation of nuclear weapons would seriously enhance the danger of nuclear war. The Treaty - also known as the non-proliferation Treaty - was concluded in 1968, at a time when there were already five nuclear-weapon Powers: the United States, the Soviet Union, the United Kingdom, France and China. This fact sheet is intended to provide background material on the Treaty, including the events that led to its conclusion, an overview of its provisions and the developments at the two previously held Review Conferences. United Nations, New York, NY (USA). Dept. for Disarmament Affairs OSTI; NTIS (US Sales Only); INIS UN 1985-07-01 English Miscellaneous Journal Issue: No. 41; Other Information: DN: Published in the official languages of the United Nations.; PBD: Jul 1985; Related Information: Disarmament fact sheet Medium: X; Size: 15 p. https://doi.org/ ON: DE92615185 [] No. 41 INIS-mf-13084 Other: ON: DE92615185; TRN: XU9200022015273 INIS; SCA: 350101; PA: AIX-23:015273; SN: 92000647020 2008-02-12 10113534