What Is Nuclear Proliferation?

Why do countries develop nuclear weapons—and what is being done to stop the spread of these weapons?

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How Do Countries Create Nuclear Weapons?

The same process used to generate nuclear power can be used to create the most destructive force we know.

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The Nuclear Nonproliferation Treaty

How effective is the world’s biggest effort to prevent nuclear proliferation?

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The History of Nuclear Proliferation

What are the most significant attempts to stop the spread of nuclear weapons, and have they succeeded?

Timeline timeline

Tools of Nonproliferation

From diplomacy to military force, world leaders try to prevent the spread of nuclear weapons in many ways. But how effective are they?

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The Nuclear World

Where are the world’s nuclear weapons and who do they protect?

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South Africa: Why Countries Acquire and Abandon Nuclear Bombs

What one country’s evolution on nuclear weapons illustrates about disarmament.

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Nuclear Proliferation Module Assessment

Questions to check your understanding

Interactive interactive

Nuclear Proliferation Reading List

Supplemental readings and other resources.

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How Nuclear Proliferation Affects You

Explore how nuclear weapons and materials shape today’s world.

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