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What it argues
On Liberty, published in 1859, is John Stuart Mill's defense of individual freedom against both governmental coercion and social pressure. Mill begins with what he calls the "very simple principle" — also known as the harm principle — that the only legitimate reason for society to interfere with an individual's freedom of action is to prevent harm to others. Harm to oneself is not sufficient justification. This sounds simple, but Mill spends the rest of the essay mapping its implications across speech, conduct, and the relationship between individual development and collective welfare.
The chapter on freedom of thought and discussion is the most celebrated and is worth reading as a stand-alone argument. Mill makes four claims for why expression should be free even when it is false or offensive. First, the censored opinion might be true. Second, even if false, it likely contains a partial truth. Third, even if entirely false, free contestation prevents true beliefs from becoming dead dogmas — comfortable slogans that no one genuinely understands because they have never had to defend them. Fourth, and most practically, suppression of dissent tends to suppress the person doing the dissenting, not merely the idea.
What it gets right
- 1.
The harm principle: society may only coerce individuals to prevent harm to others. Paternalistic interference to protect people from themselves is illegitimate.
- 2.
Freedom of thought and expression is defended on four grounds: the suppressed view may be true; it may contain partial truth; free contestation prevents true beliefs from becoming dead dogmas; and suppression harms the dissenter.
- 3.
Individuality — the development of one's distinctive capacities — is a social good, not merely a private one. Conformist societies lose the originality that drives progress.
What it covers
Who wrote it
John Stuart Mill (1806–1873) was a British philosopher, economist, and politician, and one of the most influential liberal thinkers of the nineteenth century. He was educated intensively by his father James Mill, learned Greek at three and logic by eight, and went on to work for the East India Company for thirty-five years while writing major works on logic, political economy, ethics, and women's rights. On Liberty was written in close collaboration with Harriet Taylor, whom he married in 1851. He also wrote Utilitarianism, The Subjection of Women, and A System of Logic.
