physics

Nuclear blackmail

Nuclear blackmail is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Nuclear blackmail rather than just read about it. In short: Nuclear blackmail is a form of nuclear strategy in which a state uses the threat of nuclear weapons to compel or deter an adversary's action. Definitions Jeff McMahan argues that nuclear blackmail involves the use of coercive nuclear threats to compel a country to do what it is morally at liberty not to do or to deter a country from doing what it is morally at liberty to do.

Key takeaways

Nuclear blackmail belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nuclear blackmail to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nuclear blackmail from memory before moving on to harder problems.

Reference excerpt

Nuclear blackmail is a form of nuclear strategy in which a state uses the threat of nuclear weapons to compel or deter an adversary's action.

Definitions Jeff McMahan argues that nuclear blackmail involves the use of coercive nuclear threats to compel a country to do what it is morally at liberty not to do or to deter a country from doing what it is morally at liberty to do. He notes that whether such a threat constitutes nuclear blackmail often depends on moral judgments about the action compelled or deterred—judgments that are likely to differ between opposing parties.

History

By the United States In 1953, during the final phase of active hostilities in the Korean War and the early period of the Eisenhower administration, U.S. Secretary of State John Foster Dulles conveyed messages of nuclear blackmail through indirect channels to the Communists—including the North Koreans, Chinese, and Soviets—warning to put the conflict to an end by using atomic bombs if no progress was made toward a negotiated settlement. Nuclear blackmail may have complicated rather than facilitated an armistice, because the Chinese refused to appease the Americans with their threats and the United Nations members such as the British did not support a full-scale escalation. In January 1955, the Chinese government made the decision to develop the nuclear bomb as a result of the unpredictabilities brought by the nuclear blackmail levied by foreign powers, particularly the United States. On October 16, 1964, when China became a nuclear power, the Chinese government stated:

"The Chinese Government fully understands the good intentions of peace-loving countries and peoples in demanding an end to all nuclear tests. But more and more countries are coming to realize that the more exclusive the monopoly of nuclear weapons held by the U.S. imperialists and their partners, the greater the danger of a nuclear war. They are very arrogant when they have those weapons while you haven't. But when those who oppose them also have such weapons, they will not be so haughty, their policy of nuclear blackmail and nuclear threats will not be so effective, and the possibility of complete prohibition and thorough destruction of nuclear weapons will increase. We sincerely hope that a nuclear war will never break out. We are deeply convinced that, so long as all peace-loving countries and peoples make joint efforts and persist in the struggle, nuclear war can be prevented." On April 7, 2026, US President Donald Trump posted to Truth Social that "a whole civilization will die tonight, never to be brought back again", causing international concern that Trump would use nuclear weapons in Iran during the 2026 Iran war. The Secretary General of Amnesty International said that Trump’s statement "may constitute a threat to commit genocide". Multiple right-wing commentators and many Democrats condemned the post, and some called for him to be removed through the 25th Amendment.

By Russia On September 25, 2024, Russian President Vladimir Putin warned the West that if attacked with conventional weapons Russia would consider a nuclear retaliation. Putin went on to threaten nuclear powers that if they supported another country's attack on Russia, then they would be considered participants in such an aggression. This was described by the office of Ukrainian President Volodymyr Zelenskyy as nuclear blackmail.

By others Following the 2025 India–Pakistan conflict, Indian Prime Minister Narendra Modi stated that Pakistan had been engaging in nuclear blackmail, which India would no longer tolerate, adding that the country would not be intimidated by nuclear threats. In 1981, the US Department of Energy security director Martin Dowd said there had been 75 cases in the last five years of nuclear blackmail by people threatening to release radioactive material on the public, in which almost all of the cases were threats by "cranks and weirdos" but several blackmail attempts were serious.

See also Brinkmanship Deterrence theory Doomsday Clock Essentials of Post–Cold War Deterrence Mutual assured destruction Nuclear imperialism Nuclear risk during the Russo-Ukrainian war (2022–present) Nuclear terrorism Samson Option

References

Worked examples

Example 1 — a first encounter with Nuclear blackmail

Start with the simplest possible case. Write down what Nuclear blackmail claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Nuclear blackmail before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Nuclear blackmail ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Nuclear blackmail

In research: Nuclear blackmail appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Nuclear blackmail in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Nuclear blackmail is common in secondary-school and first-year university syllabi. It links to neighbouring topics Extortion, Nuclear strategy, Nuclear terrorism, so understanding it makes those chapters shorter.
In everyday life: Look for Nuclear blackmail outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Nuclear blackmail in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nuclear blackmail means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Nuclear blackmail out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nuclear blackmail in simple terms?

Nuclear blackmail is a form of nuclear strategy in which a state uses the threat of nuclear weapons to compel or deter an adversary's action. Definitions Jeff McMahan argues that nuclear blackmail involves the use of coercive nuclear threats to compel a country to do what it is morally at liberty n…

Why does Nuclear blackmail matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Nuclear blackmail?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Nuclear blackmail.