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What if doing right begins with happiness—and justice is the hardest test of that idea?
In Utilitarianism, John Stuart Mill asks what makes an action right or wrong. His answer rests on the greatest happiness principle: actions are right as they promote happiness, wrong as they produce its reverse. He defends this view against objections and asks whether morality can rest on one clear foundation.
Mill takes Jeremy Bentham’s account of happiness in a different direction: pleasures differ in quality, not just amount. Across five short chapters, he explores why anyone should obey a moral principle, offers a disputed proof, and faces a stubborn challenge: can usefulness account for our sense of justice?
What you’ll discover
- A foundation for morality Follow Mill’s search for a clear principle beneath our judgments of right and wrong.
- More than mere pleasure Consider why the quality of happiness matters, not simply how much we experience.
- Objections taken seriously Watch Mill answer charges against happiness as a goal, including whether it is attainable.
- The pull of duty Explore the feelings and pressures that bind people to a moral principle.
- Justice under scrutiny Test the claim that justice serves utility against the conviction that some acts are inherently unjust.
Who will love it
For students of ethics, readers of politics and law, and anyone who enjoys testing how they decide what is right. Mill explores happiness, personal duty and justice through a clear, compact argument.
What’s inside
The key ideas, in the 15-minute summary
- Morality needs one clear first principle
- Right actions promote happiness, wrongs cause pain
- Common objections to the principle fall away
- Why we obey is rooted in feeling
- Happiness is proved by what people actually desire
- Justice serves utility and has lasting critics
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L’Utilitarisme
by John Stuart Mill · 1861
Mill puts happiness at the heart of morality and tests whether it can account for justice and personal duty.
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In short
Utilitarianism is a short book on one question: what makes an action right or wrong? John Stuart Mill, the English philosopher and economist, first published it as three magazine articles in 1861 and as a book in 1863.
From the 15-minute summary · Key idea 1
Morality needs one clear first principle
Mill opens by noting a strange fact. After more than two thousand years, thinkers still disagree about the basis of right and wrong. He notes that other fields also have uncertain first principles, yet their conclusions stand firm, while practical conduct seems to need an account of its ends first. He thinks this is partly hidden by the fact that people follow moral rules every day without settling why those rules bind us.
He targets the view that we know right and wrong by an inner sense, or by reason alone, in the style of Kant. Mill says such thinkers usually lay down a list of rules and never say what to do when the rules clash. A duty to tell the truth may collide with a duty to protect a person from harm. To choose between them, you need a higher standard to appeal to. Even those who deny the standard, he argues, secretly lean on the consequences of actions when they defend their own rules.
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What is Utilitarianism by John Stuart Mill about?
It argues that actions are right when they promote happiness and wrong when they cause the opposite. Mill explains the principle, answers objections, says why people should follow it, offers a proof, and shows that justice rests on it.
What is the greatest happiness principle?
It is the idea that the right action is the one that produces the greatest happiness altogether, counting each person equally. Happiness means pleasure and the absence of pain.
What is the difference between higher and lower pleasures in Mill?
Mill says pleasures differ in quality as well as quantity. Pleasures of thought, feeling and imagination are higher than bodily ones, and people who have known both will usually prefer the higher kind.
The author
John Stuart Mill
1806–1873 · British philosopher and political economist
John Stuart Mill was a British philosopher and political economist, born in London in 1806. He wrote A System of Logic (1843), On Liberty (1859), Utilitarianism (1861), and The Subjection of Women (1869). He lived in England and France and died in Avignon in 1873. His Autobiography appeared that year.
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