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Non-Proliferation Treaty (NPT)

The Treaty on the Non-Proliferation of Nuclear Weapons or Non-Prolfieration Treaty (NPT) is an international treaty developed to prevent the spread of nuclear weapons technology. Between 1965 and 1968, the treaty was negotiated by the United Nation's Eighteen Nation Committee on Disarmament. The treaty was first opened for signatures in 1968 and entered into force in 1970. See also the 1995 NPT Review and Extension Conference collection. [Image: US Ambassador Llewellyn E. Thompson signs the NPT as Soviet Foreign Minister Andrei A. Gromyko watches in Moscow, Russia, on July 1, 1968.]

Popular Documents

April 9, 1968

Excerpts from Leonid Ilyich Brezhnev’s speech at the April 1968 Plenum of the Central Committee of the Soviet Communist Party

Brezhnev discusses negotiations with the United States over the Non-Proliferation Treaty.

March 7, 1968

Record of Conversation between L. I. Brezhnev and N. Ceausescu on 7 March 1968

A record of a conversation in which Brezhnev and Ceausescu discuss weather or not to say that the Nuclear Non-Proliferation Treaty will only be signed once the United States ends its actions in Vietnam. Brezhnev advises not to raise the issue, while Ceausescu claims that it must be stated in order to advance a solution towards disarmament.

July 19, 1969

Memorandum from Henry Kissinger to President Nixon, 'Israeli Nuclear Program'

The memorandum lays out substantive and significant line of thinking about the complex problem raised by the Israeli nuclear program. Kissinger thought it might be possible to persuade the Israelis that with all of the NPT’s loopholes signing it would not prevent them from continuing their weapons research and development. Kissinger also recognized the real possibility that the Israeli development momentum could not be stopped.

October 8, 1963

Letter from Gomulka to Khrushchev, Marked 'Final Version'

Letter from Gomulka to Khrushchev discussing Polish opposition to Soviet proposal for a Non-Proliferation Treaty. Gomulka suggests that the treaty will further split the communist camp. While discussing the state of Sino-Soviet relations, the Polish leader suggests that the Soviet Union and the PRC adopt a common position in matters of foreign policy in order to strengthen the power of the Socialist camp.

September 19, 1958

Address by Mr. Frank Aiken to the United Nations General Assembly Official, 23th Session, 751st Plenary Meeting

Aiken’s landmark address to the plenary of the UN General Assembly on 19 September 1958 launched his non-proliferation campaign. It is the first time he publicly identified stopping the spread of nuclear weapons as a concrete step in the collective interest to unblock the disarmament impasse, preventing a runaway arms race among the powers of the Earth. It was clearly framed as part of his wider campaign for global governance based on the rule of law rather than the threat of force. For Aiken, the challenge was stabilizing the arms race and generating trust to construct a world order based on justice and law – “to preserve a Pax Atomica while we build a Pax Mundi.” This speech was a critical departure. The widespread positive reception encouraged Aiken, persuading him to draft a formal resolution.