A philosophical inquiry into the limits of state power and individual liberty
Introduction: The Central Problem of State Power
We begin at the opening of Popper’s essay, where he establishes the fundamental question that will guide the entire work. This section sets the stage by defining the two poles between which political philosophy must navigate: the paternalistic state and the minimal state. Popper does not present these as mere abstract categories but as living political options that every society must confront.
Popper opens by stating that the problem of the state is essentially the problem of power — how much power should be entrusted to the state, and what limits must be placed upon it. He observes that the temptation toward paternalism is ancient and persistent: the idea that the state should act as a father who knows what is best for his children, guiding them, protecting them, and sometimes forcing them for their own good. Against this stands the tradition of the minimal state, which holds that the state’s role should be strictly limited to protecting citizens from violence, theft, and fraud — a night-watchman state that leaves individuals free to pursue their own conception of the good life.
“Le problème central de la philosophie politique est celui de la limitation du pouvoir de l’État. Comment empêcher que le pouvoir ne devienne tyrannique?”
Popper then clarifies that he is not merely describing historical positions but engaging in a normative argument. He asserts that the paternalistic state inevitably leads to a loss of individual responsibility and moral autonomy. When the state decides what is good for its citizens, it treats them as permanent children incapable of making their own decisions. This is not merely a theoretical danger; Popper points to historical examples where well-intentioned paternalism has degenerated into tyranny. The road to serfdom, he suggests, is paved with good intentions.
The section matters because it establishes the moral stakes of the entire inquiry. Popper is not asking which form of state is more efficient or more pleasant to live under. He is asking which form of state respects the fundamental dignity of human beings as responsible moral agents. The choice between paternalism and minimalism, as he frames it, is ultimately a choice about what kind of creatures we believe human beings to be — autonomous adults or perpetual wards of the state.
The Critique of Paternalism: Why Benevolent Despotism Fails
Here Popper moves from setting the problem to launching a direct critique of the paternalistic model. He argues that even if a benevolent despot could exist — a ruler who genuinely desired only the good of his subjects — the project of paternalistic governance would still be morally and practically untenable. This section forms the core of Popper’s negative argument against the expansion of state power.
Popper begins by identifying the epistemic arrogance at the heart of paternalism. The paternalistic state assumes that its rulers possess knowledge that ordinary citizens lack — knowledge of what constitutes true happiness, genuine flourishing, or the proper ends of human life. But Popper contends that such knowledge is impossible. There is no objective, universal conception of the good life that can be known and applied by a central authority. What makes one person happy may make another miserable; what one person considers virtuous, another may see as vice. The paternalistic state must therefore impose one particular vision of the good on all citizens, suppressing legitimate diversity.
“Personne ne peut savoir ce qui est bon pour un autre homme. Cette vérité simple et fondamentale est la pierre angulaire de toute philosophie politique libérale.”
Popper then introduces the concept of fallibilism — the recognition that all human knowledge is provisional and subject to error. If even scientists, using rigorous methods, regularly discover that their theories were mistaken, how much more likely are political rulers to err when they claim to know what is best for millions of diverse individuals? The paternalistic state, by concentrating power and eliminating feedback mechanisms, makes catastrophic errors more likely and harder to correct. Citizens who disagree with the state’s conception of the good have no peaceful means of challenging it, because the state has already claimed ultimate authority over their moral judgments.
The section deepens as Popper examines the psychological effects of paternalism on citizens. When the state takes responsibility for making important decisions, individuals atrophy their own decision-making capacities. They become dependent, passive, and incapable of exercising the moral autonomy that Popper considers essential to human dignity. A society of dependent citizens is not only less free but also weaker — less innovative, less resilient, less capable of responding to new challenges. Paternalism, in attempting to protect citizens from the consequences of their own mistakes, actually makes them less capable of leading flourishing lives.
The Minimal State as a Negative Ideal
Having dismantled paternalism, Popper now turns to construct his positive vision: the minimal state. But he is careful to explain what he means by this term. He does not advocate for anarchy or the abolition of government; rather, he argues for a state whose functions are strictly circumscribed and whose power is rigorously checked. This section presents the minimal state not as a blueprint but as a regulative ideal — a standard against which actual states can be measured.
Popper draws a crucial distinction between negative duties and positive duties of the state. The state’s primary negative duty is to prevent harm: to stop violence, theft, fraud, and the violation of contracts. These are duties that can be enforced without the state having to decide what constitutes the good life for its citizens. The state must prevent A from killing B, regardless of whether A believes B’s death would serve some higher purpose. This is a minimal moral consensus that almost any rational person can accept.
“L’État minimal est celui qui se limite à la protection des citoyens contre la violence, le vol et la fraude. Tout au-delà est une invitation à la tyrannie.”
But Popper immediately acknowledges a problem: the line between negative and positive duties is not always clear. Does the state have a duty to prevent starvation? Is a person who lets another die of hunger committing violence? Popper does not offer simple answers but insists that the burden of proof must always fall on those who wish to expand state power. The presumption should be in favor of liberty; any restriction on freedom must be justified by a clear and present danger of harm to others.
Popper introduces the principle of minimization: the state should do only what is necessary to secure the conditions of liberty, and nothing more. This includes maintaining a system of courts, police, and national defense. It may also include, he concedes cautiously, some minimal provision for those who cannot care for themselves — but even this must be done in a way that minimizes the state’s intrusion into individual lives. The goal is not to create a perfect society but to prevent the worst injustices while leaving as much room as possible for individual initiative, experimentation, and the pursuit of diverse conceptions of the good.
The Problem of Democracy and Majoritarianism
In this section, Popper confronts a crucial objection: does the minimal state leave citizens vulnerable to the tyranny of the majority? If the state is limited in what it can do, but the majority democratically decides to expand its powers, what then? Popper must reconcile his commitment to minimal government with his commitment to democratic self-rule. He does so by distinguishing between majoritarianism and democracy as he understands it.
Popper argues that democracy is not primarily a method for arriving at the will of the majority but a mechanism for removing bad rulers without violence. The core of democracy is the peaceful transfer of power through regular elections and institutional checks. Majority rule is a means, not an end. When the majority votes to restrict the liberties of a minority — or to expand state power beyond its minimal functions — that vote may be procedurally democratic but substantively tyrannical.
“La démocratie n’est pas le règne de la majorité. Elle est un ensemble d’institutions qui permettent de se débarrasser d’un gouvernement sans violence.”
Popper introduces his famous paradox of democracy: a democratic majority could theoretically vote to abolish democracy itself. Similarly, a democratic majority could vote to establish a paternalistic state that strips citizens of their autonomy. Popper’s response is that the minimal state must be protected by constitutional constraints that are not subject to simple majority vote. Certain rights — freedom of speech, freedom of association, the right to private property, the right to dissent — must be entrenched and protected even against the will of the majority.
This section clarifies that Popper is not a populist or a simple procedural democrat. He believes that democracy requires a liberal framework that predates and limits majority rule. The minimal state is not the result of democratic decision-making but its precondition. A society that votes to surrender its liberties has not exercised democracy but committed collective suicide. The institutions of the minimal state must therefore be designed to resist even popular demands for their expansion, because such expansion ultimately destroys the conditions under which genuine democracy can exist.
The Open Society and Its Enemies: The Philosophical Foundations
Here the work moves from the critique of existing political systems to the positive articulation of what Popper calls the open society — a social order built on critical reason, individual freedom, and institutional fallibility. This section lays the philosophical groundwork for why the minimal state is not merely a practical preference but a moral and epistemological necessity.
Popper begins by contrasting the closed society with the open society. The closed society is tribal, magical, and based on unchallengeable taboos or authorities. It is a society in which “the individual is nothing, the tribe is everything” — where social roles are fixed, knowledge is sacred, and dissent is heresy. The open society, by contrast, is one in which individuals are “confronted with personal decisions” and must navigate a world of competing ideas, uncertainties, and responsibilities. This transition from closed to open society, Popper argues, is the fundamental drama of Western civilization. It begins with the ancient Greeks — particularly the Athenians — who challenged the authority of tradition through critical debate. The great enemy of this transition, then and now, is the longing to return to the security of the closed society, the yearning for a “lost paradise” of certainty, authority, and tribal belonging.
“The open society is one in which individuals are confronted with personal decisions; the closed society is one in which they are not.”
What Popper is doing here is reframing the entire debate about state power in terms of epistemology — the theory of knowledge. The closed society is attractive because it offers certainty: the king knows, the priest knows, the party knows. But this certainty is an illusion. All human knowledge is fallible, and all authorities are prone to error. The open society institutionalizes this fallibility by creating spaces for criticism, dissent, and revision. The minimal state is the political expression of this epistemological humility: it does not claim to know the Good Life for its citizens, and therefore it does not impose one. Instead, it creates the conditions — negative liberties, rule of law, open debate — under which citizens can pursue their own visions of the good while correcting errors peacefully. The paternalistic state, by contrast, is a relapse into the closed society: it claims to know what is best for everyone and silences dissent in the name of that knowledge.
This section clarifies why Popper’s argument for the minimal state is not merely about efficiency or liberty in the abstract. It is rooted in a deep philosophical claim about the nature of human knowledge: because we cannot be certain that our political prescriptions are correct, we must design institutions that allow us to discover and correct our mistakes. The minimal state is not a utopia but a fallibilist framework — a system that acknowledges its own limits and builds in mechanisms for self-correction. The paternalistic state, no matter how benevolent its intentions, denies this fallibility and therefore closes off the very possibility of improvement through criticism.
The Paradox of Freedom and the Role of Law
The work now addresses a classic objection: if the state is minimal, doesn’t that lead to a war of all against all, where the strong dominate the weak? Popper confronts this directly by examining what he calls the paradox of freedom — the idea that unlimited freedom leads to its own destruction. This section presents Popper’s nuanced account of how law and freedom are not opposites but complements within the minimal state framework.
Popper begins by stating the paradox with characteristic clarity: “Unlimited freedom leads to the destruction of freedom.” He gives the example of a society in which there is no prohibition on violence: the strongest individuals will use force to enslave or intimidate the weak, and the freedom of the many will be lost to the tyranny of the few. Therefore, the minimal state must use coercive law to prevent this outcome. But here is the crucial distinction: the law should restrict only that freedom which threatens the freedom of others. It should not restrict freedom in order to make people happier, wiser, or more virtuous. The purpose of law in the minimal state is negative — to prevent harm and coercion, not to promote any positive conception of the good life.
“The state must protect the freedom of its citizens by restricting their freedom, but only insofar as this is necessary to prevent them from harming others.”
Popper then draws a sharp distinction between this protective function and the paternalistic function. A law against murder is justified because murder destroys the victim’s freedom entirely. A law requiring attendance at a certain church, or mandating a particular diet, or forbidding the reading of certain books, is not justified — because these laws restrict freedom without preventing harm to others. They are based on the assumption that the state knows what is good for its citizens better than they do themselves. Popper acknowledges that the line between “harm to others” and “harm to oneself” can be blurry in practice, but insists that the principle is clear and must guide institutional design. The burden of proof must always fall on those who wish to restrict freedom, and the restriction must be narrowly tailored to prevent demonstrable harm to others.
This section clarifies that the minimal state is not an anarchist fantasy. It is a state that uses coercive power, but uses it only to preserve the framework of liberty. Popper’s insight is that freedom and law are not in tension when law is properly understood as the condition for the possibility of freedom. The paternalistic state errs by expanding the scope of law beyond this protective function, while the anarchist errs by denying the need for any coercive law at all. The minimal state navigates between these extremes by adhering strictly to the harm principle — a concept Popper inherits from John Stuart Mill but grounds in his own epistemological argument about fallibility. Because we cannot know the truth with certainty, we must allow individuals the maximum space to experiment with different ways of living, interfering only when their experiments harm others.
The Critique of Historicism and the End of Destiny
In one of the most intellectually ambitious sections of the work, Popper connects his political theory to a sweeping critique of historicism — the belief that history follows predetermined laws and that we can know the course of its future development. This section demonstrates that the paternalistic state and the historicist worldview are deeply linked: both claim access to a kind of knowledge that human beings cannot legitimately possess.
Popper defines historicism as the doctrine that “history is governed by specific historical or evolutionary laws whose discovery would enable us to prophesy the destiny of mankind.” He traces this idea through Hegel, Marx, and their followers, showing how each posits a hidden logic of history — the unfolding of Spirit, the dialectic of class struggle, the inevitable march toward a final utopia. The political implication is devastating: if history has a predetermined goal, then rulers who claim to understand this goal are justified in suppressing dissent and imposing their vision. Dissenters are not merely wrong; they are obstacles to the cosmic plan. The paternalistic state, in its most dangerous form, becomes the executive committee of history, crushing individuals in the name of a future that it claims to see with certainty.
“Historicism is a method which aims at historical prediction, and which teaches that this is the aim of the social sciences. It is based upon the idea that history has a plot or a meaning which can be discovered.”
Popper’s counterargument is both epistemological and political. Epistemologically, he argues that the future is fundamentally unpredictable because human knowledge grows, and we cannot predict what we will know tomorrow. The growth of knowledge is a key driver of historical change, and if we cannot predict the content of future knowledge, we cannot predict the course of history. Politically, he argues that historicism leads inevitably to authoritarianism — because it provides a seemingly scientific justification for suppressing dissent. The enemy of the open society is not just the tyrant who loves power but the idealist who believes he has found the key to history. Popper contrasts this with his own piecemeal social engineering — the method of making small, reversible, and testable changes to social institutions, learning from mistakes, and adjusting course. The piecemeal engineer knows he is fallible; the historicist claims infallibility.
This section clarifies that Popper’s minimal state is not just a political preference but a methodological necessity. A society that abandons historicism must also abandon the grand ambitions of the paternalistic state. It cannot aim to remake human nature or to realize a perfect society, because it acknowledges that it does not know what perfection would look like. Instead, it can only aim to identify and eliminate the worst evils — tyranny, poverty, oppression — through cautious experimentation. The minimal state is the political embodiment of anti-historicism: it has no grand destiny to fulfill, only the modest task of preventing suffering and preserving the conditions for peaceful coexistence and critical inquiry.
The Growth of Knowledge and the Limits of State Action
We move now into Popper’s treatment of epistemological fallibilism and its direct implications for state power. Having established that we cannot know the future and cannot claim certain knowledge about the ideal society, Popper now draws out the concrete political consequences of this epistemic humility.
Popper begins by establishing a fundamental link between the growth of knowledge and political freedom. He argues that human knowledge does not advance through accumulation of certainties, but through a process of conjecture and refutation. We propose hypotheses, test them against reality, and discard those that fail. This is the method of science, and Popper insists it must also be the method of politics. The critical question becomes: what kind of political system allows this process to operate most effectively? The answer, Popper argues, is a system that permits the maximum possible criticism of existing institutions and policies. A paternalistic state that suppresses dissent in the name of its own certain knowledge cuts itself off from the very mechanism of error correction. It cannot learn from its mistakes because it refuses to admit that it makes them. Popper writes that “the growth of knowledge depends entirely on the existence of a tradition of critical discussion” — and such a tradition requires political institutions that protect the critic, not just the ruler.
The argument here is that the paternalistic state is not merely morally objectionable but epistemologically self-defeating. If we accept that all knowledge is fallible, including the knowledge of those who govern, then we must build institutions that allow for the detection and correction of error. Popper identifies freedom of criticism as the single most important political condition for the growth of knowledge. This means freedom of speech, freedom of the press, freedom of assembly — but not as ends in themselves. These freedoms are valuable because they serve as error-detection mechanisms. They allow the governed to point out mistakes in policy, to challenge assumptions, to propose alternatives. A state that silences criticism is a state that chooses to remain ignorant of its own failures. And ignorance of failure, in Popper’s framework, is not safety but the path to catastrophic collapse.
This section thus redefines the entire debate between minimal and paternalistic state. The question is not simply one of liberty versus security or individual rights versus collective welfare. The question is: what kind of state can learn? Popper’s answer is decisive: only a state that permits its own citizens to correct it. The minimal state is not minimal because it does less, but because it recognizes that it does not know enough to do more. Its modesty is epistemological before it is political.
Piecemeal Social Engineering vs. Utopian Social Engineering
Popper now introduces one of his most famous and influential conceptual distinctions: the contrast between piecemeal social engineering and utopian social engineering. This distinction is the practical political application of the fallibilist epistemology developed in the preceding section.
Utopian social engineering is the approach of the paternalistic state. It begins with an ideal vision of the perfect society — a blueprint of how human beings should live, what values they should hold, what institutions they should create. Once this blueprint is established, the utopian engineer seeks to remake society in its image. All existing institutions, traditions, and practices are judged against the ideal and discarded if they do not conform. Popper describes this method as “a holistic approach to society” that treats the entire social order as a single system to be redesigned from the ground up. The problem, he argues, is not merely practical but logical. To implement a utopian blueprint requires enormous power concentrated in few hands — the power to destroy existing institutions, to suppress opposition, to reshape human behavior. This power inevitably corrupts and, more importantly, is exercised without feedback. The utopian engineer cannot admit that the blueprint itself might be flawed, because the entire project depends on the certainty of its vision.
Piecemeal social engineering, by contrast, proceeds by small, incremental reforms. It does not begin with a vision of the perfect society but with the identification of specific, concrete problems. Popper lists examples: “the fight against unemployment, against poverty, against disease, against illiteracy, against inequality of opportunity, against crime, against discrimination.” Each of these is a negative goal — the elimination of a particular evil — rather than a positive vision of the perfect good. The piecemeal engineer does not ask “What is the ideal society?” but “What is the worst evil we can identify and eliminate right now?” This approach has the decisive advantage of learnability. The effects of a small reform can be observed, evaluated, and if necessary reversed. Mistakes are contained and correctable. The piecemeal engineer, unlike the utopian, can admit failure and try something else.
Popper’s argument is that piecemeal social engineering is not a compromise or a second-best solution. It is the only rational method of social change, given the limits of human knowledge. The utopian engineer claims to know what the perfect society looks like, but this claim is always unjustified. The piecemeal engineer knows only that certain evils exist and can be fought. Popper writes that “the piecemeal approach is the only one that does not demand the concentration of power in the hands of a few.” It distributes power across many actors and institutions, each of whom can propose and test reforms within their domain. This is not merely a pragmatic preference but a methodological necessity: piecemeal engineering is the only method that treats society as a subject of experimental inquiry rather than an object of dogmatic construction.
The Problem of Unintended Consequences and the Limits of Planning
Popper now deepens the argument by examining the problem of unintended consequences in social action. This section connects the epistemological critique to the practical failures of state planning.
Popper begins by observing that all human action, especially collective action through the state, produces consequences that cannot be fully anticipated. This is not a defect of particular policies but a fundamental feature of social life. Human beings act on the basis of imperfect information, respond to incentives in unpredictable ways, and interact in complex systems that no single mind can comprehend. The paternalistic state, in its ambition to control and direct society, systematically underestimates this complexity. Popper points to the history of central economic planning as a case study. Planners in the Soviet Union and other command economies believed they could calculate the optimal allocation of resources, set prices, and direct production. The result was not efficiency but chronic shortages, misallocations, and widespread suffering. The planners did not lack good intentions, Popper argues; they lacked the information that only decentralized decision-making through markets can generate. The price system, as Hayek had shown, is a mechanism for aggregating dispersed knowledge that no central authority can possess.
But Popper extends this critique beyond economics to all forms of state intervention. Any policy that aims to reshape society on a large scale will produce effects that the planners did not foresee and cannot control. The law of unintended consequences is not an argument against all state action, but it is an argument against the kind of ambitious, holistic planning that characterizes the paternalistic state. Popper distinguishes between aims and results: well-intentioned policies frequently produce results that are the opposite of what was intended. Minimum wage laws, for example, may aim to help the poor but can produce unemployment. Rent controls may aim to make housing affordable but can reduce the supply of housing. The point is not that such policies are always wrong, but that they must be implemented cautiously, with constant monitoring and willingness to adjust.
This leads Popper to a crucial insight: the minimal state is not a state that does nothing, but a state that acts experimentally. It recognizes that every intervention is a hypothesis that may be falsified by experience. The proper attitude of the state toward its own policies is not confidence but tentativeness. Popper writes that “the state should always be prepared to learn from its mistakes and to change its course accordingly.” This requires institutions that are flexible, decentralized, and open to criticism. It requires a political culture in which admitting error is a sign of strength, not weakness. The paternalistic state, by contrast, is committed to the infallibility of its own wisdom and therefore cannot learn. Its mistakes become entrenched and accumulate until they produce catastrophe. The minimal state, in Popper’s framework, is the only form of political organization that can genuinely engage in social learning over time.
The Institutional Framework of the Minimal State
Having established the epistemological and methodological foundations, Popper now turns to the concrete institutional design of the minimal state. This section moves from abstract principles to specific proposals for how such a state would actually function.
Popper identifies two fundamental tasks that any state must perform: the prevention of violence and the protection of freedom. These are not separate goals but two sides of the same coin. Violence is the primary threat to freedom because it allows some to impose their will on others through force. The minimal state exists to suppress private violence — theft, assault, fraud, coercion — and to replace it with the rule of law. This is the classic liberal function of the state, and Popper embraces it fully. But he adds a crucial qualification: the state must be strong enough to suppress violence but not so strong that it becomes the primary source of violence itself. This is the paradox of state power: the state must have a monopoly on legitimate force to prevent private force, but that same monopoly can be turned against the citizens it is meant to protect.
To resolve this paradox, Popper proposes a system of institutional checks and balances. The minimal state must be divided into separate powers — legislative, executive, judicial — each of which can check the others. This is not a new idea; Popper draws explicitly on Montesquieu and the American Founders. But he gives it a distinctive twist by grounding it in his fallibilist epistemology. The separation of powers is not merely a mechanism for preventing tyranny, but a system for generating and testing competing claims. The legislature proposes laws; the executive implements them; the judiciary interprets them and judges their conformity with constitutional principles. Each branch acts as a critic of the others, and this critical interaction produces better policy over time. Popper argues that “the best constitution is not the one that guarantees the best outcomes, but the one that makes it easiest to detect and correct errors.”
Popper also discusses the institutional protection of minority rights. He distinguishes between the majority principle as a decision-making procedure and the tyranny of the majority as a political pathology. The majority principle is necessary for democratic decision-making, but it must be constrained by constitutional limits that protect basic freedoms from any majority vote. These limits include freedom of speech, freedom of assembly, habeas corpus, and the prohibition of ex post facto laws. The minimal state, in Popper’s conception, is a constitutional state that binds itself by its own rules. It cannot violate individual rights even in the name of the common good, because the common good is defined precisely as the protection of those rights. This does not mean that rights are absolute — Popper accepts that they may be limited in exceptional circumstances — but it means that any limitation must be justified by clear and present dangers, not by vague appeals to collective welfare. The institutional framework of the minimal state is designed to make such justifications public, contestable, and temporary.
The Minimal State and the Welfare Question
Popper now addresses the most contentious issue in his theory: the relationship between the minimal state and the welfare state. Critics of liberalism have long argued that a truly minimal state would abandon the poor and vulnerable to the mercies of the market. Popper engages this criticism directly.
He begins by clarifying that his own position is not laissez-faire. The minimal state is not the night-watchman state of nineteenth-century liberalism, which did nothing to alleviate poverty or provide public goods. Popper accepts that the state has a legitimate role in providing a safety net for those who cannot provide for themselves. He writes that “the state has a duty to protect its citizens not only from violence but also from extreme deprivation.” The reason is not paternalistic — it is not that the state knows better than individuals what is good for them — but rather that extreme poverty destroys the capacity for autonomous choice. A person who is starving is not free, no matter how many formal liberties the constitution grants. Freedom requires a basic level of material security.
However, Popper insists that welfare provisions must be designed to preserve rather than undermine the conditions of freedom. This means that welfare should be targeted, temporary, and conditional where possible. It should aim to restore individuals to self-sufficiency rather than create permanent dependence. Popper distinguishes between negative welfare — the prevention of extreme suffering — and positive welfare — the attempt to engineer specific outcomes for individuals. The minimal state should engage in the former but be extremely cautious about the latter. He is particularly skeptical of redistributive policies that aim to equalize outcomes rather than opportunities. Equality of outcome, he argues, requires constant interference in people’s lives and inevitably leads to the concentration of power in the hands of the redistributors. The goal should be equality of opportunity — a fair start for everyone — rather than equality of results.
Popper’s position is thus a form of social liberalism that accepts the need for some redistribution while resisting the comprehensive ambitions of the welfare state. He insists that welfare programs must be limited, transparent, and subject to democratic control. They must not create a class of professionals whose careers depend on expanding the scope of state intervention. They must be designed so that their effects can be observed and evaluated, and so that they can be reformed or abolished when they fail. The minimal state, in short, can have welfare policies — but it must approach them with the same experimental, fallibilist attitude that it brings to all other areas of policy. Welfare is not a right to specific benefits but a collective responsibility to prevent the worst forms of suffering, exercised through institutions that remain accountable and open to criticism.
The Problem of Sovereignty and the Rule of Law
We are now in the final movement of the work, where Popper addresses the foundational question of who holds ultimate authority in the minimal state, and how that authority must be constrained.
Popper begins by stating that the traditional concept of sovereignty — the idea of an ultimate, indivisible, and final power within a state — is incompatible with the open society. The very notion of a sovereign, whether a monarch, a parliament, or a people, contains within it the seed of tyranny. For if there exists a body or person whose decisions are final and cannot be challenged, then that body stands above the law, and the state becomes, in principle, a dictatorship. The question “Who should rule?” is, for Popper, the wrong question. It leads inevitably to the search for a wise and benevolent ruler, which is the foundation of paternalism. The right question is: “How can we organize political institutions so that bad or incompetent rulers can be prevented from doing too much damage?”
“The question ‘Who should rule?’ should be replaced by the question ‘How can we organize political institutions so that bad or incompetent rulers can be prevented from doing too much damage?'”
This shift in questioning is the cornerstone of Popper’s institutional theory. He argues that the rule of law, properly understood, is not merely a set of commands issued by a sovereign, but a framework of abstract, general rules that apply equally to all citizens, including the rulers themselves. These rules must be predictable, non-retroactive, and enforced by independent courts. The sovereign — whether a parliament or a president — must itself be subject to these rules. This is the only way to prevent arbitrary power. Popper draws a distinction between the rule of law and the rule of men. In a state governed by the rule of law, no one is above the law; in a state governed by the rule of men, the law is merely an instrument of the ruler’s will. The minimal state, therefore, must be a constitutional state — a Rechtsstaat — in which the powers of government are clearly defined and limited by a constitution that is itself subject to amendment only through difficult, deliberative processes.
The importance of this argument for the work as a whole is decisive. Popper has spent the entire work critiquing paternalism and defending the minimal state, but he now provides the institutional mechanism that makes the minimal state possible: the subordination of all political power to abstract, general, and enforceable laws. Without the rule of law, the minimal state collapses into either the tyranny of the majority or the dictatorship of a single ruler. The minimal state is not a state without power; it is a state whose power is constitutionally chained. The rule of law is the leash.
The Role of Critical Public Opinion
Popper now turns to the question of how the rule of law can be sustained over time, and what force prevents the state from gradually expanding its powers beyond their legitimate limits.
The answer, Popper argues, lies in the existence of a critical public opinion that is free, informed, and active. No constitution, no matter how well designed, can protect liberty on its own. Laws are only as strong as the willingness of the people to defend them. The minimal state therefore requires a public sphere — a space in which citizens can debate policy, criticize the government, and hold rulers accountable. This requires, at a minimum, freedom of speech, freedom of the press, freedom of assembly, and the right to form political parties and opposition movements. Popper insists that these freedoms are not merely private rights but public necessities. They are the mechanisms by which errors in policy can be detected and corrected. A government that silences its critics is a government that has blinded itself to its own mistakes.
Popper addresses the objection that public opinion is often ignorant, emotional, and manipulated by demagogues. He acknowledges this danger but argues that the solution is not to suppress public opinion but to improve it through education, open debate, and the free exchange of ideas. The open society depends on the critical rationalism of its citizens — their willingness to subject their own beliefs, as well as the government’s actions, to scrutiny and falsification. Popper draws a direct parallel between scientific progress and political progress: in science, theories are tested by open criticism and experiment; in politics, policies are tested by open debate and electoral accountability. The same fallibilist attitude that drives science must drive politics. The minimal state is, in this sense, the political expression of critical rationalism.
This section clarifies a key point that runs throughout the work: the minimal state is not a machine that runs on its own. It is a fragile and demanding form of political organization that depends on the active, critical engagement of its citizens. The state can remain minimal only if the public is vigilant, informed, and willing to resist the temptation to grant the government more power in times of crisis. The minimal state is, ultimately, a moral project that requires a certain kind of citizen — one who values freedom over security, criticism over conformity, and responsibility over dependency.
The Question of Transition: How to Build the Minimal State
Popper concludes the substantive argument by addressing the practical question of how a society can move from a paternalistic or authoritarian state toward the minimal state. He does not offer a detailed blueprint, but he provides a set of guiding principles.
First, Popper argues that the transition must be gradual and piecemeal. Sudden, revolutionary transformations are dangerous because they concentrate immense power in the hands of a small group of planners and create unpredictable consequences. The transition to the minimal state should proceed through a series of small, reversible, and testable reforms — each one designed to reduce the scope of state power in a specific area, and each one subject to evaluation and correction. Second, the transition must be democratic and consensual. It cannot be imposed from above by a vanguard or a dictator, no matter how enlightened they claim to be. The people must be persuaded, not coerced. This requires an open, public debate about the costs and benefits of state intervention, and a willingness to experiment with different forms of institutional design. Third, the transition must be institutionally anchored. New laws and constitutions must be enacted that limit the powers of the state, protect individual rights, and establish independent courts and oversight bodies. These institutions must be designed to be self-reinforcing — that is, they must create incentives for future rulers to respect the limits placed on their power.
Popper acknowledges that the transition to the minimal state is not inevitable and may fail. Human beings are fallible, and institutions are imperfect. But the alternative — the continued expansion of the paternalistic state — is, in his view, a path toward serfdom. The minimal state is not a utopia; it is the least bad form of political organization that human beings have yet devised. It does not guarantee happiness, equality, or justice in any absolute sense. It guarantees only the freedom to make mistakes and learn from them — the freedom to live one’s own life, to pursue one’s own goals, and to bear the consequences of one’s own choices. And that, for Popper, is the highest political good that can be achieved.
The work ends here, with the recognition that the minimal state is not a final destination but an ongoing project — a constant effort to hold power accountable, to protect liberty, and to keep the future open. The last image is not of a perfect society but of a society that has learned to live with its own imperfection, and has built institutions that allow it to correct its errors without destroying itself.
