Mill asks where individual sovereignty ends and social authority begins. Each sphere should handle what chiefly concerns it: individuality owns the part of life that primarily affects the person; society owns the part that primarily affects others. Living in society imposes real obligations, not from a fictional contract but from reciprocity. Each person must refrain from injuring recognized interests, bear a fair share of common defense and sacrifice, and accept that conduct harming others, even when no strict legal right is violated, may be punished by opinion though not always by law. As soon as conduct prejudicially affects others, society has jurisdiction and may debate whether interference promotes general welfare. Where conduct affects no one besides the agent, or only willing and informed participants of full age, there should be perfect legal and social freedom to act and to bear the consequences.
That freedom is not selfish indifference. Unfavorable judgment and private avoidance may answer self-regarding folly; rashness, wastefulness, or hurtful indulgence may lower one's standing without injustice, because only the natural consequences of such faults are legitimate. By contrast, cruelty, malice, envy, deceit, domineering pride, and other vices toward others are true moral offenses whose bad dispositions deserve reprobation. Mill rejects paternalism toward adults: if people are unfit to manage their own lives, they are even less fit to manage everyone else's. The claim that society has a "social right" to protect a person from himself, distinct from protecting others, is nonsense once examined. When self-regarding conduct breaks a definite duty to others, as intemperance that leaves a family destitute, the reproach attaches to the breach of obligation, not to the private appetite itself; George Barnwell would be hanged for murdering his uncle whether the motive were a mistress or a business stake. Likewise, purely self-regarding failure may become social when it disables a public duty, though punishment for mere self-harm alone is never warranted.
The harder problem is offense mistaken for injury. Many people treat another's mere distaste as an injury to themselves, like a religious bigot who says his feelings are outraged when others persist in worship he hates. Mill answers that there is no parity between one's attachment to one's own opinion and another person's offense at it. Taste, like opinion or property, belongs chiefly to the individual; resentment at another's different way of living is not the same as being wronged, any more than a thief's desire for a purse equals the owner's desire to keep it. Yet real majorities constantly legislate their preferences as morality because moralists tell them to consult feeling as law. Muslims' disgust at pork exceeds ordinary religious prohibition; wine is forbidden too, but without the visceral revulsion pork inspires. If a Muslim majority banned pork, the only tenable objection would be that public authority has no business governing personal diet, even when believers sincerely think God abhors the practice. Spaniards treated non-Catholic worship as gross impiety; Southern Europeans regarded a married clergy as unchaste and disgusting while Protestants resent Catholic coercion. The logic used to suppress "personal immorality" would justify every persecutor who believes himself right unless we adopt the rule that we may persecute because we are correct and others may not because they are wrong.
Nearer home, Puritan majorities would ban amusements a Calvinist commonwealth would forbid if they held power, and English readers should ask whether they would accept Calvinist regulation of pleasure simply because a majority wanted it. Mill imagines Parliament dominated by strict Calvinists and Methodists regulating permitted amusements; the public would tell them to mind their own business, yet that is exactly what majorities should be told when they moralize self-regarding conduct. Democratic sumptuary pressure already makes lavish spending socially dangerous in the United States; combine that feeling with socialist opinion and property itself could become infamous, as artisan moral police already attack piecework and superior wages. Maine liquor laws, Sabbath restrictions on railways and museums, and other measures rest on the theory that one man's duty is to make another religious; that principle founded old persecutions and still motivates milder versions of the same intolerance. Sunday travel bans and museum closures differ in cruelty from burning heretics, Mill notes, but the state of mind is the same: refusal to tolerate conduct permitted by another's conscience because it offends one's own. Mormon polygamy draws savage English condemnation though other societies tolerate similar institutions; Mill detests it because it rivets chains on women, yet notes that participants enter voluntarily under customs that make marriage the one thing needful, and argues that outrage against Mormons exceeds any consistent liberty principle applied to Englishmen. Throughout, Mill insists that harm, not disgust, must govern interference. A civilization that cannot tolerate difference in self-regarding conduct has already surrendered the capacity its priests and teachers should have defended. The chapter's work is to mark that boundary before the final applications.
Coming Up in Chapter 5
Having established the theoretical boundaries between individual liberty and social authority, Mill now turns to practical applications. How do these principles work in real-world situations involving education, marriage, trade, and government regulation Mill closes with specimens of application, not a code. Two maxims govern the essay: individuals are not accountable to society for self-regarding conduct, and they are accountable when their actions prejudice others..