Fundamentals

Liberal Garantism: What It Means and How It Limits Punitive Power

By Daniel Sardá · Published on June 07, 2026

8 min read1,654 words

Liberal garantism describes the affinity between legal guarantees and the liberal tradition of limiting coercion, but it is not a doctrinal identity.

Liberal garantism can be understood as the defense of legal guarantees that protect people from arbitrary uses of power, especially punitive power. Its basic idea is simple: even when the state is pursuing a crime, it cannot act without limits, evidence, or procedure.

The expression, however, needs care. Garantism is not the same thing as liberalism, and there is no single stable school formally called “liberal garantism.” The more accurate relation is one of affinity: both can coincide in limiting coercion and protecting individual liberty, even if they differ in scope and in other doctrinal commitments.

In brief: calling garantism liberal makes sense when the emphasis is on legality, the presumption of innocence, the right of defense, and limits on punitive power. It becomes imprecise when it tries to identify all of garantism with a fully liberal doctrine.

What garantism is

In law, a guarantee is a mechanism designed to make rights effective and prevent power from violating them. It is not enough to declare that a person has liberty, property, defense, or legal equality. Institutions and rules are also needed to restrain those who can interfere with those rights.

The jurist Luigi Ferrajoli developed garantism first in relation to criminal law. In that field, the problem is especially clear: the state has police, prosecutors, courts, and prisons, and it can impose one of the most serious interventions against a person, punishment.

Penal garantism seeks to subject that power to strict conditions. Among them are a prior law, a precise definition of the offense, the need to prove the accusation, the right of defense, and the action of an independent judge.

Its purpose is not to prevent every conviction. It is to prevent someone from being convicted on mere suspicion, political convenience, social pressure, or arbitrary decision.

This concern connects with the rule of law: public power must act through known, general, and reviewable rules, not according to the momentary will of whoever governs.

Penal guarantees and procedural guarantees

A basic distinction helps explain how garantism works.

Penal guarantees limit what may be punished and with what penalty. They require, for example, that conduct be defined in advance as a crime and that punishment not depend on a rule invented after the facts. In simple terms, they limit the law of punishment.

Procedural guarantees limit how investigation, accusation, evidence, and judgment take place. They include the right of defense, the burden of proving the accusation, the possibility of challenging evidence, and judicial impartiality. In simple terms, they limit the procedure used to impose punishment.

The difference can be seen in a hypothetical case. Suppose a law clearly defines an offense and sets a proportionate penalty. That legality is a penal guarantee. But it would still be unjust to convict someone without letting them know the accusation, present a defense, or question the evidence. Those are procedural guarantees.

Both types are mutually necessary. An impeccable procedure does not correct an arbitrary criminal law. A reasonable law does not legitimize a manipulated trial.

Why garantism has a liberal affinity

The affinity between garantism and liberalism appears in a shared question: how do you keep coercive power from becoming arbitrary?

Classical liberalism holds that political power must be justified and remain limited. From that perspective, liberty does not depend only on rulers having good intentions. It depends on institutions, rules, and controls that reduce their ability to interfere capriciously in people's lives.

The penal core of garantism applies that concern to state punishment. Legality prevents the prosecution of conduct that was not prohibited. Proof requires the accusation to be demonstrated. Defense allows a response to the accusing power. Judicial independence seeks to prevent the process from becoming a political order disguised as a sentence.

These guarantees matter even when an accusation seems plausible or when the accused is unpopular. Precisely in the cases that provoke fear, outrage, or rejection, it becomes clear whether limits on power are principles or merely revocable concessions.

From a liberal perspective, guarantees are not accidental obstacles to governing. They are part of the conditions that make the use of public force legitimate.

Affinity does not mean identity

Although the relationship is real, calling all garantism liberal would be excessive.

Ferrajoli extended the garantist paradigm beyond criminal law. In his legal and constitutional formulation, guarantees can protect liberty rights, social rights, and other fundamental rights against public and private powers. That theory includes both prohibitions on interference and positive duties to act.

This breadth goes beyond the specific problem of limiting punishment and opens debates about which rights should be recognized, which benefits should be demanded, and what functions belong to the state. Different liberal currents do not answer those questions in the same way.

It is therefore useful to distinguish two levels:

• There is a strong affinity between penal garantism and the liberal tradition of limiting coercion.
• There is no necessary identity between all constitutional garantism and classical liberalism.

The label “liberal garantism” describes a point of contact better than a total equivalence. It is useful for highlighting an anti-arbitrary core, but it does not prove that every garantist proposal is liberal or that every liberal accepts each aspect of garantist theory.

Garantism does not mean impunity

A common criticism says that guarantees favor the accused and make it harder to protect victims. The concern for investigating crimes, repairing harm, and sanctioning the responsible is legitimate. But it does not follow that guarantees are dispensable.

Garantism does not claim that nobody should be convicted. It claims that a legitimate conviction requires an applicable law, a proven accusation, and a valid process. If those conditions are met, punishment does not contradict garantism.

The alternative to guarantees is not perfectly effective justice. It is a power with greater capacity to make mistakes, discriminate, fabricate culprits, or punish enemies. A system that lowers evidentiary standards to convict one innocent person also makes it less likely that the real responsible party will be identified.

Guarantees protect the accused directly, but their institutional function is broader: they discipline those who investigate, accuse, and judge. In doing so, they protect anyone who may come under punitive power.

What positive guarantees are

Another source of confusion comes from the expression positive guarantees. In Ferrajoli's legal classification, negative guarantees consist of prohibitions on violating rights, while positive guarantees consist of obligations to provide certain services or benefits. Secondary guarantees come into play when a primary obligation or prohibition has been violated.

“Positive” does not mean favorable to punishment or in favor of harsher penalties. A state obligation to provide or protect something is not the same as an authorization to expand penal power.

For that reason, the controversial use of “positive garantism” can be confusing if it is presented as the opposite of a supposedly lenient garantism. Before using the expression, it is necessary to clarify whether one is speaking of obligations linked to rights or of a proposal to intensify criminal enforcement. Those are different questions.

Common confusions about liberal garantism

“Garantist” as a partisan label

In public debate, “garantist” can be used as praise or as an accusation. That usage often hides the important question: which specific guarantee is being defended, which power does it limit, and which right does it protect?

A position does not become rigorous because it adopts the label. The language of rights can also be used selectively, defending guarantees for allies and denying them to opponents.

Garantism and penal progressivism

Garantism can coincide with progressive currents in criticism of penal abuse, but they are not synonyms. Its core consists in subjecting punishment to rules and guarantees. The partisan, social, or economic positions of whoever defends that core require separate analysis.

Garantism and penal liberalism

“Penal liberalism” usually refers to a tradition that limits punishment, requires legality, and distrusts the expansive use of penalty. In that terrain, the closeness to penal garantism is considerable. Even so, the terms come from different theoretical frameworks and are not always interchangeable.

Guarantees and rights defense in general

Defending a right matters, but garantism also asks how compliance is ensured. What obligation does it generate? Who must respect it? What control exists when it is violated? Without that institutional level, the word guarantee can be reduced to a statement of intention.

When it is useful to speak of liberal garantism

The expression is useful when it helps explain that punitive power needs legal limits and that those limits have a deep affinity with individual liberty. It also helps reject the false choice between punishing crimes and respecting guarantees: a legitimate sanction needs both.

More precise terms are preferable when the discussion concerns a specific institution. If the issue is prior law, it is better to speak of penal legality. If the topic is the rules of trial, procedural guarantees is the better phrase. If the issue is the full structure of constitutional rights and duties, “constitutional garantism” will probably be clearer.

The practical criterion is simple: the word liberal clarifies garantism when it highlights limits on coercion and rejection of arbitrariness; it obscures it when it tries to absorb a broad legal theory into a single political tradition.

A relationship based on limits

Liberal garantism should not be understood as a perfectly delimited school, but as a way of naming an affinity. Penal garantism and liberalism coincide in the idea that the power to punish requires justification, rules, proof, defense, and control.

That coincidence is important, but partial. Legal garantism can encompass obligations and rights whose scope is debated inside and outside liberalism. Preserving the distinction makes it possible to recognize common ground without erasing real differences.

In the end, the garantist question is not whether we trust those who exercise power. It is what limits they must respect even when we believe they are pursuing a legitimate end.