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. The first maxim does not justify every interference that might prevent damage. Winning a competition injures rivals, yet society permits open contest because only fraud, treachery, or force would warrant stopping it. Trade affects others, but free exchange generally serves buyers and sellers better than official price setting; adulteration, fraud, and workplace dangers may be regulated without invoking the deeper liberty principle. Restrictions aimed at making a commodity hard to obtain, such as poison laws, opium import bans, or prohibitions like the Maine Law, infringe the buyer's liberty, not merely the seller's.
Poison sales illustrate legitimate police power. Government may act before crime is committed, but prevention is easily abused because almost any freedom can be painted as facilitating delinquency. If poisons were used only for murder, banning them might be right; because they also serve lawful purposes, regulation must distinguish cases. If a bridge is known to be unsafe, seizing a walker may save him without violating liberty, because he does not desire to fall; where risk is uncertain, warning should usually suffice unless the person is a child, delirious, or unable to reflect. Labeling poisons, requiring records of sale, and Bentham's preappointed evidence can hinder criminal use without blocking legitimate buyers; demanding medical certificates for every purchase would be a graver burden. Drunkenness alone should not be criminal, but a person previously violent when drunk may be placed under special restriction, because making himself drunk then becomes injury to others. Idleness cannot be punished except where it breaks duties such as supporting children, when compulsory labor may be legitimate. Private vice differs from public indecency, which may be banned because the offense is publicity itself, not the act done in private.
Harder boundary cases involve profiting from vice. Fornication and gambling may be tolerated while pimping or keeping a gambling house is contested, because interested instigators are not impartial counselors; Mill leans toward restricting houses that commercialize temptation even when principals remain free, yet admits the asymmetry of punishing accessories while leaving actors alone is uneasy and should not extend by analogy to ordinary buying and selling. Liquor taxes may discourage excess without banning consumption, and licensing tied to public order differs from artificially scarce beer houses that expose everyone to inconvenience because some might abuse access; that model treats laborers as children to be restrained until proved fit for freedom, which no free country has truly attempted. Voluntary slavery is void because liberty cannot include the permanent right not to be free. Marriage and personal-service contracts are more complex: Humboldt argued that such engagements should never bind beyond limited duration and that marriage should end at either party's declared will, but Mill replies that reliance, broken expectations, and especially duties to third parties, including children created by the relation, impose moral constraints even when law allows release.
Family relations expose misapplied liberty most sharply. Wives should have the same legal rights and protections as any other persons; defenders of injustice there appeal to power, not liberty. Children are not literal parts of a father, yet opinion resists even minimal legal interference with parental control more jealously than interference with adult freedom. Compulsory education up to a standard is a state duty, but state teaching is not: government should require schooling, help pay for the poor, and use public examinations to enforce attainment while leaving instruction plural. State-run education would mold citizens into sameness under whichever sect or party controls the curriculum; examinations should test facts and tools, not orthodoxy on religion or politics, though voluntary higher tests may certify knowledge without conferring privilege. Bearing children without a fair prospect of supporting and educating them is a moral crime; continental laws conditioning marriage on means do not violate liberty because they prevent harm to others, even though current notions of liberty oddly resist such restraint while tolerating real invasions of self-regarding freedom.
Beyond coercion lies the question of state aid. Mill favors doing locally what individuals or voluntary associations can do better, both for efficiency and because acting for oneself trains judgment, as juries, municipal bodies, and philanthropic associations do. That practical education in joint concerns sustains free institutions where local liberty is weak. Government operations tend to uniformity; voluntary life allows experiments whose results the state should collect and circulate rather than monopolize. The third and strongest objection to unnecessary interference is enlarging state power itself: when roads, banks, universities, charities, and local boards all become branches of central administration, even talented bureaucrats absorb the country's ability and citizens look to officials for direction in everything. Russia shows reforming rulers paralyzed by officials who veto by inaction; countries habituated to state agency revolt without learning self-government, swapping rulers while bureaucracy endures. Americans improvise civil order because they transact their own business; no bureaucracy can long coerce a people trained that way. Yet perfect administrative machinery can still enslave governors and governed alike, as mandarins and Jesuits illustrate, and concentration of talent in office eventually dulls the office itself without outside criticism.
The practical ideal is the greatest dissemination of power consistent with efficiency, with information centralized and shared rather than action monopolized. Municipal superintendence may gather experience from many local trials and spread it without turning local officers into mere agents of a central will. Government should inform, advise, and sometimes denounce, not replace private initiative or do for citizens what they can do for themselves. The worth of a state, in the long run, is the worth of the individuals composing it; a state that dwarfs its people to make smoother machinery will find that perfected administration cannot compensate for the vital power it destroyed.
