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Thinkers

John Stuart Mill

1806–1873, London

Utilitarianism and liberalism

Let people run their own lives, unless they are harming someone else.

The harm principleHigher and lower pleasuresFree speechExperiments in living
“The only purpose for which power can be rightfully exercised over any member of a civilised community, against his will, is to prevent harm to others.”
On Liberty, Chapter 1

The life

Mill was the subject of an educational experiment designed by his father, James Mill, with Bentham's encouragement. He began Greek at three, Latin at eight, and had worked through logic, history and Ricardo's political economy by his early teens. He was kept away from other children.

At twenty he had a severe depressive collapse and found that achieving all his father's reforms would not have made him happy. He recovered partly through Wordsworth's poetry, and the experience permanently changed his utilitarianism: feeling and individuality became part of the theory rather than distractions from it.

He worked for the East India Company for thirty-five years. His long relationship and eventual marriage with Harriet Taylor shaped everything he wrote after; he insisted she was effectively co-author of On Liberty. As an MP from 1865 he became the first member of Parliament to propose votes for women.

What shaped the ideas

Britain was industrialising, extending the franchise, and arguing about how far the state and, just as importantly, public opinion should reach into private life. Mill's fear was less government tyranny than social tyranny: the pressure of respectable opinion, which he thought could crush individuality more thoroughly than any law.

He inherited Bentham's utilitarianism, which measured only quantity of pleasure, and spent his career repairing it against the charge that it was a philosophy fit for pigs.

Core arguments

  1. 01

    The harm principle

    The only justification for coercing an adult is preventing harm to others.

    Over their own body and mind, the individual is sovereign. Their own good, physical or moral, is not a sufficient warrant, because nobody is better placed to judge their interests, and coercion for someone's own benefit corrodes the capacity for self-direction that makes a person more than a machine.

  2. 02

    The argument for free speech

    Suppressing an opinion costs you something whether it is true or false.

    If the silenced opinion is true, you lose the chance to exchange error for truth. If false, you lose the sharper understanding of your own position that comes from defending it. Most commonly it is partly true, and you lose the missing part. Unchallenged truths decay into dead formulas people repeat without grasping.

  3. 03

    Higher and lower pleasures

    Pleasures differ in quality, not only in amount.

    Ask people who have experienced both kinds which they prefer. Those competently acquainted with intellectual and emotional pleasures do not trade them for greater quantities of simple sensation, even at a cost in contentment. Better to be Socrates dissatisfied than a fool satisfied, because the fool only knows one side.

  4. 04

    Experiments in living

    Society benefits from people trying out unconventional lives.

    Nobody knows in advance which ways of living are best, and different natures need different conditions to flourish. Diversity of practice is how a society finds out, which makes eccentricity a public good and conformity a cost, however comfortable it feels.

Commonly got wrong

  • The higher pleasures argument is widely thought to abandon hedonism, because judging pleasures by quality seems to appeal to a standard other than pleasure. Mill denies this, but the objection has never been fully answered.
  • On Liberty explicitly excludes children and, notoriously, "backward states of society", which he thought required benevolent despotism. This colonial exclusion is connected to his career at the East India Company and is not a stray remark.
  • The harm principle is not self-applying. Almost everything affects others somehow, and Mill's distinction between harm and mere offence or indirect effect does a great deal of unexamined work.

Works

  • A System of Logic 1843

    His largest work and the source of his reputation in his lifetime.

  • On Liberty 1859

    Short, and probably the most influential defence of individual freedom in English.

  • Utilitarianism 1863

    Five essays defending the theory and adding the quality distinction.

  • The Subjection of Women 1869

    Argues the legal subordination of women is wrong in itself and a drag on everyone.

  • Autobiography 1873

    The account of his education and breakdown, published after his death.

On Liberty, chapter 2, on freedom of thought and discussion. It is the strongest chapter and stands alone.

Why they still get taught

He wrote the standard defence of individual liberty and of free expression, and the harm principle remains the default framework in arguments about drugs, speech, assisted dying and privacy.

Chapters