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The Treaty on the Nonproliferation of Nuclear Weapons is the cornerstone of the nonproliferation regime. It entered into force in 1970, and 190 states have subscribed.  This Treaty has made the world safer and more prosperous for all States Party, and it remains one of the most successful treaties ever negotiated.

The basic bargain at the core of the NPT is sound:

  • Countries with nuclear weapons will move towards disarmament;
  • Countries without nuclear weapons will not acquire them; and
  • All countries can access peaceful nuclear technology.

The United States remains dedicated to preserving and strengthening the nuclear nonproliferation regime, on which the Treaty is based, for future generations.

The NPT Review Process

The Treaty allows for the Parties to gather every five years to review its operation. At the 1995 Review and Extension Conference, the Parties extended the Treaty indefinitely and formalized the practice of convening a Review Conference every five years, as well as holding Preparatory Committee meetings during each of the three years preceding a RevCon. Learn More»

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U.S. Department of State

The Lessons of 1989: Freedom and Our Future