12 · J. S. Mill · Tocqueville · Karl Popper · Robert Nozick · Isaiah Berlin

Liberty & the state

Once kings were tamed, liberals had to ask what limits a government of the people should respect. Alexis de Tocqueville toured America in 1831 and came back with both admiration and a warning about majorities and gentle, all-providing states. John Stuart Mill's On Liberty (1859) set out the harm principle and the case for free discussion. In the 20th century, Karl Popper (The Open Society and Its Enemies, 1945) and Isaiah Berlin (Two Concepts of Liberty, 1958) answered totalitarianism, and Robert Nozick (Anarchy, State, and Utopia, 1974) asked whether liberty is compatible with any fixed pattern of distribution. Montesquieu and Madison supply the machinery: divided power. Each model below lets you test one of these arguments.

The harm principle: when may society coerce?

mill-harm-principlemill-self-regarding
Mill's 'one very simple principle': the only purpose for which power can rightfully be exercised over anyone against their will is to prevent harm to others. Their own good is not enough. Classify these acts (most are Mill's own examples) and compare your answers with his.
Drag each act into a zone (or use its buttons). Mill's verdict appears once it's placed.

To classify · 14

Getting drunk at home, alone
A police officer drunk on duty
Writing in a newspaper that corn dealers starve the poor
Saying the same to an angry mob outside a corn dealer's house
Winning customers from a rival until their shop closes
Eating pork where most people find it disgusting
Opening your shop on the Sabbath
Selling yourself into slavery, voluntarily
Starting to cross a bridge known to be unsafe
Selling poison at a pharmacy
Not educating your children
Not paying your debts because you spent the money on drink
Indecent acts in a public square
A polygamous marriage among consenting adults

Concerns only me (or consenting adults)

self-regarding

    Harms the interests of others

    other-regarding
      Classified
      0/14
      Same zone as Mill
      –
      Society may act
      –
      per Mill, of those placed

      Try: place the corn-dealer pair, the two drunks, and "winning customers from a rival". The same words or acts change category with context, and harming someone is not by itself enough to justify coercion.

      Free discussion: why silence even a false opinion?

      mill-marketplace-of-ideasmill-dead-dogma
      Sixty people hold beliefs about eight claims. Some start out mostly wrong. They see weak evidence and argue; arguments for the truth are slightly stronger because they survive scrutiny. A censor backs an orthodoxy on every claim and, like every censor in history, gets some wrong. Watch which errors get corrected.
      Devil's advocates

      60 people, 8 claims · round 0

      0 statements suppressed
      The Earth orbits the Suntrue · censor says false ⚠Childbed fever is spread by doctors' un…true · censor says false ⚠Bleeding a patient cures feverfalse · censor says true ⚠Heavier objects fall fasterfalse · censor says falseTrade between nations makes both richertrue · censor says trueWitches cause crop failuresfalse · censor says falseContinents drifttrue · censor says trueUlcers are caused by bacteriatrue · censor says trueeach column is a person · green = believes the truth · red = believes the error · grey = unsure
      Beliefs that are true
      14%
      Living truths
      0%
      true and recently challenged
      Claims most people get wrong
      8/8
      incl. 3 of the 3 the censor gets wrong

      Share of beliefs that are true

      free speechcensorship 80% (same start)living truths (yours)
      0%50%100%0200400600800round

      Try: play with free speech: errors held by most people at the start (the Sun orbiting the Earth) are slowly argued away. Reset with censorship at 80%: the claims the censor got wrong freeze. Then notice the blue line under free speech: once everyone agrees, no one hears the other side and truths turn into "dead dogma". Add contrarians and watch it stay alive.

      “If all mankind minus one were of one opinion, mankind would be no more justified in silencing that one person than he, if he had the power, would be justified in silencing mankind.” (Mill, On Liberty, 1859)

      Tyranny of the majority

      tyranny-of-the-majority
      Democracy answers who rules, not what rulers may do. Here 25 citizens vote every round, and 13 votes can pass anything, including taking half of the other twelve's income. Compare a permanent majority faction (Madison's nightmare) with shifting coalitions, then add a bill of rights enforced by courts.
      Majority
      Constitution

      The assembly · round 0

      treasurysize = wealth · fill = sense of security · white ring = in this round's majority

      Press play: the assembly meets once a round.

      Output this round
      250
      with rights: 250
      Avg wealth, gold faction
      100
      Avg wealth, violet faction
      100
      Total wealth
      2,500
      with rights: 2,500

      Average wealth by faction

      gold (13)violet (12)anyone, under a bill of rights
      0501000204060round

      Try: with a permanent faction and no limits, the violet minority is stripped every round and stops investing. Switch to shifting coalitions: now everyone is a victim some of the time, and even the "winners" end up poorer than under a bill of rights. Then turn the bill of rights on.

      Tocqueville: associations and soft despotism

      tocqueville-associationstocqueville-soft-despotism
      'Americans of all ages, all conditions, all minds constantly unite.' Problems keep arising around a township. Households with the habit of association rally neighbours and fix them, getting better at it each time. The more the capital promises to handle, the more people wait for it, and the habit fades. It looks fine until the capital can't deliver.

      A township · week 0

      the capitalhandles 0.8 problems/weekwaiting for the capital: 0brighter = stronger civic habit · lines = association at work · gold ring = waiting on the capital
      Habit of association
      55%
      Solved by citizens
      –
      Backlog at the capital
      0
      Avg wait at the capital
      0.0 wk

      Civic habit and backlog over time

      habit of association (%)backlog
      0501000100200300400500week

      Try: play at low centralization: associations form everywhere and the habit strengthens. Reset, push centralization to 80%: everything works smoothly, while the habit quietly fades. Then trigger a budget crisis and compare how each town copes.

      Two concepts of liberty: freedom from, freedom to

      berlin-negative-libertyberlin-positive-libertyconstant-ancients-moderns
      Berlin separated two answers. Negative liberty asks: how large is the area in which I'm left alone? Positive liberty asks: who governs me, and am I my own master? Both are real values and they can conflict. Benjamin Constant had drawn a related line in 1819 between the liberty of the ancients (sharing in power) and of the moderns (a protected private life).

      Two concepts of liberty

      "forced to be free"negative liberty: freedom from interference →positive liberty: self-mastery, self-rule →Athens (ancients)Constant's modernsMill's idealRousseau's general willUSSR (claimed)Nordic welfare stateNozick's minimal stateHobbes's Leviathanyour society

      Build your society

      Mill's ideal

      Wide negative liberty bounded by the harm principle, combined with representative government and education that builds people's ability to choose their own lives.

      Try: click the places on the map to read why they sit where they do (these placements are rough and arguable). Then build your own society and notice which policies trade one liberty for the other. Finally tick "State decides citizens' true interests".

      Nozick's Wilt Chamberlain: liberty upsets patterns

      nozick-entitlement-theorynozick-wilt-chamberlainnozick-minimal-state
      Choose the distribution you consider just: equal, by need, by merit. Call it D1. Wilt Chamberlain signs a contract that gives him 25 cents of every ticket. Fans freely choose to go. At the end of the season, is the new distribution D2 unjust? If so, which voluntary transfer was the wrong one?
      D1 (your just pattern)
      Re-impose pattern every 10 games

      Holdings · game 0 of 80

      Nozick: 1,000,000 fans × 25¢ = $250,000
      Wilt: $100white tick = holding under D1 · red = holds stolen money
      Gini coefficient
      0.000
      D1 was 0.000
      Wilt's share
      2.0%
      Entitlement test
      just
      just start + voluntary steps
      Forced redistributions
      0
      interference needed to keep the pattern

      Lorenz curve

      perfect equalitynow
      0%50%100%0%20%40%60%80%100%share of people (poorest first)

      Ledger (latest first)

      • No transfers yet.

      Try: pick any D1 and play the season. Every transfer is a fan's free choice, yet the pattern is gone. Restore it, play on, and it breaks again; switch on automatic re-imposition and count the interventions. Inject a theft: the entitlement test fails, not because of the shape of the distribution but because of its history.

      Popper: piecemeal reform, utopian blueprints and the paradox of tolerance

      popper-piecemeal-engineeringpopper-open-societypopper-paradox-of-tolerance
      Social welfare is a landscape no one can see. The utopian planner trusts a theory of it, marches to the theory's peak in one disruptive leap and doesn't turn back. The piecemeal reformer tries small changes, keeps what works and reverses what doesn't. Our theories are always partly wrong; the question is whose method survives that.
      Society changes over time

      Policy landscape · step 0

      brighter = better lives (unknown to the actors)
      blueprintstatus quo
      Utopian: welfare now
      0.66
      Piecemeal: welfare now
      0.66
      Utopian: lived total
      0
      sum over all steps
      Piecemeal: lived total
      0

      Welfare along the way

      utopian blueprintpiecemeal reform
      transition00.51050100150step

      Try: set the planner's error to 0 (a perfect theory): the blueprint wins after its painful transition. Raise it, and the plan marches confidently to the wrong place and stays there. Piecemeal reform climbs only by trial and error, may stall on a lesser hill, but never bets everything on one theory, and with "society changes" on it keeps tracking while the blueprint goes stale.

      The open society also needs a rule about its enemies. “Unlimited tolerance must lead to the disappearance of tolerance.” Popper didn't mean banning intolerant opinions; he meant the state must not tolerate those who refuse argument and turn to force.

      A society · tick 0

      blue = tolerant · red = intolerant · faded = silenced · outline = jailed for using force

      Tolerant
      86%
      Acts of force
      0
      0 punished
      Silenced right now
      0
      Tolerant critics wrongly silenced
      0

      Share tolerant over time

      0%50%100%0100200300tickmajority

      Try: under unlimited tolerance, a 12% minority that uses intimidation grows, takes over, and ends tolerance. Popper's rule lets them argue but punishes force: they stay a minority. Banning their opinions also wins, but silences some innocent critics and hands the state a weapon; Popper reserved suppression for those who answer arguments with fists.

      Separation of powers: ambition against ambition

      separation-of-powersmadison-checks-and-balances
      Montesquieu: when the same body makes, executes and judges the laws, there is no liberty. Madison: since people aren't angels, give each branch the means and the motive to resist the others. Proposals stream from the rulers toward becoming law; turn checks on and see what gets through, and what it costs.

      From proposal to law

      rulerslawSecond chamberExecutive vetoIndependent courtsFederalismFree press & electionsred = abuse of power · green = ordinary good law · dots below a check = stopped there
        Abuses enacted
        0
        0 blocked
        Good laws blocked
        0
        0 enacted · cost of checks
        Chance an abuse gets through
        100%
        Chance a good law gets through
        100%

        Try: with no checks, every abuse becomes law. Add checks one by one and watch the odds of abuse fall while a few good laws get caught too. Then slide "one faction controls every branch" up: the formal checks are still there, but only the courts and the press keep working.

        • takeawayCoercion needs a reason, and harm to others is the main one. Speech, private conduct and peaceful difference are protected because no authority is infallible, and errors are only found when they can be challenged.
        • takeawayMajorities and benevolent states are dangers too. Rights, divided power and a living civil society protect minorities and keep citizens able to govern themselves.
        • takeawayPrefer what can be corrected. Small reversible reforms beat untestable blueprints, and a just distribution is judged by how it arose, not only by its shape.

        Key concepts · 18

        J. S. Mill · Tocqueville · Karl Popper · Robert Nozick · Isaiah Berlin
        1. Harm principle

          The only purpose for which power can rightfully be exercised over anyone against their will is to prevent harm to others.

          It rules out coercing people for their own good or to enforce majority morals. Harm is necessary but not sufficient: some harms (losing to a competitor) are part of a free society, and Mill made exceptions such as selling oneself into slavery.

          John Stuart Mill, On Liberty (1859)

          Decriminalization of homosexuality (UK Wolfenden Report, 1957)Debates over drug prohibition
          ↑ see it in the visualization
        2. Self-regarding vs other-regarding conduct

          Conduct that concerns only yourself (or consenting others) versus conduct that affects others' interests.

          Over the first, 'the individual is sovereign'. Society may still advise, persuade or avoid you, but not punish. Critics note that almost any act affects someone; Mill's answer was to look for definite damage to definite interests.

          Mill, On Liberty (1859), ch. 4

          ↑ see it in the visualization
        3. Free discussion and fallibility

          Silencing an opinion assumes infallibility: the opinion may be true, partly true, or false but useful for understanding why the truth is true.

          Mill's four grounds for free speech. The phrase 'marketplace of ideas' came later (from Justice Holmes's 1919 dissent in Abrams v. United States), but the argument is Mill's.

          Mill, On Liberty (1859), ch. 2

          Galileo's trial (1633)Semmelweis and hand-washing (1840s)
          ↑ see it in the visualization
        4. Dead dogma

          A true belief held without ever hearing the case against it becomes a formula repeated, not understood.

          Mill argued that even a false opinion helps keep the truth alive, and that where no dissenters exist, teachers should invent the strongest objections (the devil's advocate).

          Mill, On Liberty (1859), ch. 2

          ↑ see it in the visualization
        5. Tyranny of the majority

          Oppression of minorities by a democratic majority, through law or through the social pressure of opinion.

          Tocqueville made the phrase famous; Mill adopted it and stressed social tyranny, which 'leaves fewer means of escape'. Madison's answer in Federalist 10 was a large republic with many shifting factions plus constitutional limits.

          Tocqueville, Democracy in America (1835); Mill, On Liberty (1859)

          Jim Crow laws in the US SouthAthens sentences Socrates to death (399 BC)
          ↑ see it in the visualization
        6. Civil associations

          Voluntary groups (churches, clubs, charities, town meetings, companies) through which citizens solve common problems without the state.

          Tocqueville saw them as the school of self-government in a democracy: the habit of acting together is learned by doing, and it is what stands between isolated individuals and an all-powerful state.

          Tocqueville, Democracy in America, vol. 2 (1840)

          New England town meetingsTemperance societies of the 1830s
          ↑ see it in the visualization
        7. Soft despotism

          A mild, tutelary central power that provides for everyone's needs and in doing so takes away the habit and capacity of governing themselves.

          It doesn't tyrannize; it 'hinders, compresses, enervates'. Tocqueville feared it more than violent despotism for democracies because people would welcome it.

          Tocqueville, Democracy in America, vol. 2 (1840)

          ↑ see it in the visualization
        8. Negative liberty

          Freedom from interference: the area within which a person can act unobstructed by others.

          Berlin defended it as the safer ideal: it doesn't require anyone to know what you really want, only that they leave you alone within a protected area.

          Isaiah Berlin, Two Concepts of Liberty (1958)

          ↑ see it in the visualization
        9. Positive liberty

          Freedom as self-mastery: being your own master, governing yourself and acting on your rational will.

          A noble idea that Berlin thought could be turned upside down: if your 'true self' is identified with the state, the nation or history, coercing you can be called liberating you.

          Isaiah Berlin, Two Concepts of Liberty (1958)

          Rousseau: 'forced to be free'Soviet claims to liberate the true self
          ↑ see it in the visualization
        10. Liberty of the ancients vs the moderns

          Ancient liberty was sharing directly in collective sovereignty; modern liberty is enjoying a protected private life, with government by representatives.

          Constant argued that the French revolutionaries had tried to impose ancient liberty on modern commercial people, with terrible results, and also warned moderns not to give up political participation entirely.

          Benjamin Constant, The Liberty of the Ancients Compared with that of the Moderns (1819)

          ↑ see it in the visualization
        11. Entitlement theory

          A distribution is just if it arose from just acquisition and voluntary transfer, with past injustices rectified.

          It is a historical theory: you can't tell whether a distribution is just by its shape alone, only by how it came about. This puts it at odds with end-state theories such as Rawls's.

          Robert Nozick, Anarchy, State, and Utopia (1974)

          ↑ see it in the visualization
        12. Wilt Chamberlain argument

          Start from any distribution you think just; let a million fans freely pay 25¢ each to watch Wilt play; the new, unequal distribution arose by voluntary steps from a just one.

          Nozick's conclusion: 'liberty upsets patterns'. Keeping a pattern requires continual interference with people's choices. Critics (Cohen, Rawlsians) reply that fans didn't consent to the effects on third parties, and that taxes known in advance are part of the background rules.

          Robert Nozick, Anarchy, State, and Utopia (1974)

          ↑ see it in the visualization
        13. Minimal state

          A state limited to protection against force, theft and fraud and the enforcement of contracts: the 'night-watchman'.

          Nozick argued that it could arise from anarchy without violating anyone's rights, and that any more extensive state would violate them. He described it as a framework for utopias: people form whatever communities they like within it.

          Robert Nozick, Anarchy, State, and Utopia (1974)

          ↑ see it in the visualization
        14. Piecemeal social engineering

          Reform by small, reversible steps aimed at removing concrete evils, with results checked and mistakes corrected.

          Popper contrasted it with utopian engineering, which aims at an ideal society through total reconstruction. Since we can't foresee consequences, a plan too big to evaluate or undo can't learn from its errors, and tends to suppress the criticism it would need.

          Karl Popper, The Open Society and Its Enemies (1945); The Poverty of Historicism (1957)

          ↑ see it in the visualization
        15. Open society

          A society in which institutions and beliefs are open to criticism and leaders can be removed without bloodshed.

          Popper's version of democracy is not 'who should rule?' but 'how can we get rid of bad rulers without violence?'. It is falsifiability applied to politics: policies are conjectures to be tested.

          Karl Popper, The Open Society and Its Enemies (1945)

          ↑ see it in the visualization
        16. Paradox of tolerance

          Unlimited tolerance can lead to the disappearance of tolerance, if the intolerant are allowed to destroy it.

          Popper did not mean suppressing intolerant opinions as such: as long as they can be countered by argument, suppression would be unwise. The right to suppress applies when they refuse argument and answer with fists or pistols.

          Karl Popper, The Open Society and Its Enemies (1945), vol. 1, notes to ch. 7

          ↑ see it in the visualization
        17. Separation of powers

          Legislative, executive and judicial power held by different people so that none can make, carry out and judge its own laws.

          Montesquieu, drawing on England's constitution, held that liberty is lost when these powers are united in one person or body. It became a blueprint for the US Constitution.

          Montesquieu, The Spirit of the Laws (1748)

          ↑ see it in the visualization
        18. Checks and balances

          Giving each branch the constitutional means and personal motive to resist encroachment by the others.

          'Ambition must be made to counteract ambition' (Federalist 51). Parchment barriers aren't enough; checks work only if those holding power in each branch have an interest in using them, which a single dominant party can undermine.

          James Madison, Federalist Nos. 47–51 (1788)

          US presidential veto and judicial reviewFederalism in Switzerland and Germany
          ↑ see it in the visualization