Hans Kelsen’s Pure Theory of Law
Hans Kelsen’s Pure Theory of Law is one of the most influential positivist theories in jurisprudence. Kelsen sought to explain law as a distinct normative system without reducing it to morality, politics, sociology, psychology or commands issued by a sovereign.
His theory is built around the ideas of norms, hierarchy, legal validity and the Grundnorm or basic norm. Every valid legal norm derives its authority from a higher norm, creating a structured legal order.
This article follows our notes on the nature, scope and sources of jurisprudence, Austin’s Command Theory, and H.L.A. Hart’s Theory of Law.
Who Was Hans Kelsen?
Hans Kelsen was an Austrian jurist and legal philosopher whose work shaped twentieth-century jurisprudence and constitutional theory. His most famous contribution is the Pure Theory of Law, which attempts to study law on its own terms as a normative order.
An authoritative academic overview is available in the Stanford Encyclopedia of Philosophy entry on Kelsen’s Pure Theory of Law.
Why Is It Called a “Pure” Theory?
Kelsen called his theory “pure” because he wanted jurisprudence to focus exclusively on law as a system of norms. He sought to exclude questions belonging to other disciplines.
Thus, the Pure Theory separates law from:
- morality;
- politics;
- sociology;
- psychology;
- religion;
- natural-law philosophy.
The aim is not to say that these subjects are unimportant. Rather, Kelsen argues that legal science should not confuse them with the question of legal validity.
Law as a Normative System
Kelsen treats law as a system of norms. A norm states what ought to be done rather than merely describing what happens in fact.
For example:
- “Parliament enacted a statute” describes an event.
- “The statute is legally valid and ought to be obeyed” expresses a normative legal meaning.
Is and Ought
Kelsen relies heavily on the distinction between is and ought.
| Is | Ought |
|---|---|
| Descriptive fact | Normative requirement |
| What happens | What should legally happen |
| Belongs to factual sciences | Belongs to normative legal science |
A factual event cannot by itself produce legal validity. The event acquires legal significance only because another valid norm authorises it.
Hierarchy of Norms
Kelsen conceives a legal system as a hierarchy. A lower norm is valid because it was created according to a higher norm.
A simplified hierarchy in a constitutional system may look like this:
- Constitution;
- Acts of legislature;
- delegated legislation;
- administrative orders;
- individual legal decisions.
The exact structure depends on the legal system, but the theoretical principle remains the same: lower norms derive validity from higher norms.
Grundnorm or Basic Norm
The chain of validity cannot continue indefinitely. Kelsen therefore posits a Grundnorm, or basic norm, as the ultimate presupposed norm from which the validity of the legal order is understood.
The Grundnorm is not ordinarily enacted by a legislature or written in a constitutional clause. It is presupposed by legal science to explain why the constitution and the norms created under it are treated as valid.
Example of the Grundnorm
Suppose a municipal rule is legally valid because it was made under a statute. The statute is valid because Parliament enacted it under constitutional authority. The Constitution is treated as legally binding because the legal system presupposes an ultimate foundational norm requiring obedience to the historically effective constitution.
This foundational presupposition is what Kelsen describes through the Grundnorm.
Characteristics of the Grundnorm
- it is presupposed, not enacted;
- it is the ultimate source of normative validity;
- it gives unity to the legal system;
- it is not identical to morality;
- it is not the command of a sovereign;
- it changes if the foundational legal order changes successfully.
Legal Validity
For Kelsen, a norm is legally valid when it has been created in accordance with a higher valid norm.
Validity therefore depends on normative pedigree, not necessarily on the moral quality of the rule.
Validity versus Effectiveness
Kelsen distinguishes validity from effectiveness.
- Validity concerns whether a norm belongs to the legal system.
- Effectiveness concerns whether the norm or legal order is actually observed and enforced.
Individual rules may remain valid despite occasional disobedience. But the legal order as a whole must maintain a minimum level of effectiveness for the Grundnorm presupposition to remain meaningful.
Static and Dynamic Systems
Kelsen distinguishes static and dynamic normative systems.
| Static System | Dynamic System |
|---|---|
| Lower norms derive content logically from higher principles | Lower norms derive validity from authorised procedures |
| Typical of moral systems | Typical of legal systems |
| Content relationship central | Creation through delegated authority central |
Law as a Coercive Order
Kelsen also recognises coercion as a characteristic of law. Legal norms often attach sanctions to specified conduct.
However, unlike Austin, Kelsen does not define law simply as commands of a sovereign. The focus is on the normative structure authorising coercive consequences.
Sanctions in Kelsen’s Theory
Sanctions remain important because legal norms often prescribe that certain coercive acts ought to occur when specified conditions are satisfied.
The structure is therefore not simply “Do X or be punished,” but rather a norm directing authorised institutions to impose a consequence where legally defined conditions arise.
Primary and Secondary Norms
Kelsen sometimes analyses legal duties indirectly through sanction-imposing norms. A norm directed to an official imposing a sanction may be treated as central, while the citizen’s duty is derived from that structure.
This differs from Hart’s later distinction between primary duty-imposing rules and secondary rules of recognition, change and adjudication.
Kelsen and Sovereignty
Kelsen rejects Austin’s idea that law depends upon a legally unlimited human sovereign. For Kelsen, sovereignty is better understood as a characteristic of the legal order itself.
The State is not above the law; rather, the State and the legal order are conceptually identified within his theory.
State and Law
Kelsen rejects the dualistic idea that the State exists independently and then creates law. He argues that the State is essentially the personification of the legal order.
This enables Kelsen to explain public power without relying on an extra-legal sovereign.
Kelsen versus Austin
| Austin | Kelsen |
|---|---|
| Law is command of sovereign backed by sanction | Law is a hierarchy of valid norms |
| Sovereign is ultimate authority | Grundnorm is ultimate normative presupposition |
| Habitual obedience important | Normative validity important |
| Law explained through political superiority | Law explained through authorised norm creation |
Kelsen versus Hart
| Kelsen | Hart |
|---|---|
| Ultimate basis is presupposed Grundnorm | Ultimate basis is social rule of recognition |
| Pure normative theory | Social-rule theory |
| Hierarchy of norms central | Primary and secondary rules central |
| Validity traced upward normatively | Validity identified through official social practice |
Kelsen and Natural Law
Kelsen rejects the proposition that legal validity must depend on moral goodness or natural justice. A norm can be legally valid even if morally objectionable, provided it was created according to the valid legal order.
This makes Kelsen a strong legal positivist.
Revolution and Change of Grundnorm
Kelsen’s theory has an important explanation for revolutionary constitutional change. If an old constitution is replaced through a successful revolution and the new legal order becomes effective, the foundational presupposition shifts.
Legal validity is then understood by reference to the new effective constitutional order.
International Law
Kelsen devoted substantial attention to international law and rejected Austin’s view that international law is merely positive morality.
He considered international law a genuine normative legal order and explored whether domestic legal systems derive validity within a broader international normative structure.
Monism and Dualism
Kelsen is often associated with a monist conception of domestic and international law, treating them as parts of one normative system rather than completely separate legal universes.
Kelsen’s Theory and the Indian Constitution
Kelsen’s hierarchy of norms provides a useful way to understand Indian constitutional structure.
A simplified Indian hierarchy may be represented as:
- Constitution of India;
- Parliamentary and State legislation within constitutional competence;
- delegated legislation;
- executive and administrative orders;
- individual decisions and legal acts.
The official Constitution is available through the Legislative Department.
Constitutional Supremacy
Kelsen’s theory fits systems in which lower laws must conform to a higher constitution. In India, legislation can be invalidated where it violates constitutional limitations.
Article 13 and Norm Hierarchy
Article 13 illustrates normative hierarchy because ordinary laws inconsistent with Fundamental Rights are subject to invalidity to the extent of inconsistency.
See our detailed article on Fundamental Rights under the Constitution.
Basic Structure Doctrine and Kelsen
The Indian Basic Structure Doctrine adds complexity to a simple hierarchy. Even a constitutional amendment enacted under Article 368 may be invalid if it destroys the basic structure.
This can be understood as an internal limitation on the constitutionally authorised amendment process. See our article on the Basic Structure Doctrine.
Judicial Review
Judicial review ensures that lower legal norms remain consistent with higher constitutional norms. This fits naturally within a hierarchical theory of legal validity.
Delegated Legislation
Delegated legislation also illustrates Kelsen’s dynamic system. Rules made by the executive are valid because legislation authorises the rule-making power, while the legislation itself derives authority from the Constitution.
Strengths of Kelsen’s Theory
- provides a systematic explanation of legal validity;
- explains hierarchy within legal systems;
- avoids dependence on an unlimited sovereign;
- fits written constitutional systems;
- distinguishes legal validity from morality;
- provides a theory of revolutionary legal change;
- treats international law as a genuine normative order.
Criticisms of the Pure Theory
1. Grundnorm Is Hypothetical
The most common criticism is that the Grundnorm is presupposed rather than empirically demonstrable. Critics ask why legal science must posit such a norm at all.
2. Excessive Formalism
By excluding morality, politics and sociology, the theory may understate the social forces that actually shape law.
3. Law Cannot Be Completely “Pure”
Legal interpretation often requires context, purpose, policy and moral reasoning. A theory that isolates law completely may therefore be descriptively incomplete.
4. Effectiveness and Validity Remain Connected
Kelsen seeks to distinguish validity from effectiveness, but the continued validity of the entire legal order ultimately depends on sufficient effectiveness.
5. Custom and Judicial Creativity
Custom and judicial development can be difficult to explain solely through a neat hierarchical model where authority always descends from a higher enacted norm.
6. Multiple Constitutional Sources
Modern constitutional systems may contain conventions, precedents, unwritten principles and supranational obligations that complicate a simple pyramid.
Kelsen and Hart: Which Better Explains India?
Kelsen is especially useful for understanding constitutional hierarchy, delegated authority and judicial review. Hart is especially useful for explaining the social practices by which officials recognise valid sources and the role of secondary rules.
The two theories therefore illuminate different dimensions of the Indian legal system.
Frequently Asked Examination Questions
- Explain Kelsen’s Pure Theory of Law.
- Why is Kelsen’s theory called “pure”?
- Explain the is–ought distinction.
- What is a legal norm?
- Explain the hierarchy of norms.
- What is the Grundnorm?
- Distinguish validity from effectiveness.
- Explain static and dynamic normative systems.
- Discuss sanctions in Kelsen’s theory.
- Compare Kelsen and Austin.
- Compare Kelsen and Hart.
- Explain Kelsen’s view of sovereignty.
- Discuss Kelsen’s theory of State and law.
- Explain revolution and change of Grundnorm.
- Critically examine Kelsen’s Pure Theory.
- Apply Kelsen’s theory to the Indian Constitution.
5-Mark Answer: Kelsen’s Pure Theory
Kelsen’s Pure Theory of Law treats law as a hierarchy of norms. Each lower norm derives validity from a higher norm, and the chain of validity ultimately rests on a presupposed Grundnorm or basic norm. The theory is “pure” because Kelsen seeks to separate legal science from morality, politics and sociology. He distinguishes legal validity from factual effectiveness and rejects Austin’s unlimited sovereign. The theory is valuable for explaining constitutional hierarchy, though it is criticised for relying on a hypothetical Grundnorm and for excessive formalism.
10-Mark Answer Structure
- Introduce Kelsen and legal positivism.
- Explain why the theory is “pure.”
- Explain law as a normative system.
- Discuss is and ought.
- Explain hierarchy of norms.
- Define Grundnorm.
- Distinguish validity and effectiveness.
- Compare Kelsen with Austin and Hart.
- State criticisms.
- Apply the theory to the Indian Constitution.
One-Minute Revision Table
| Question | Answer |
|---|---|
| Kelsen’s school? | Legal positivism |
| Main theory? | Pure Theory of Law |
| Law is? | Hierarchy of norms |
| Ultimate norm? | Grundnorm |
| Grundnorm enacted? | No, presupposed |
| Validity means? | Norm created according to higher valid norm |
| Effectiveness means? | Actual observance and enforcement |
| Austin differs because? | Austin relies on sovereign command |
| Hart differs because? | Hart relies on social rule of recognition |
| Indian relevance? | Constitutional hierarchy and judicial review |
Conclusion
Kelsen’s Pure Theory of Law offers a powerful explanation of law as an autonomous normative order. The hierarchy of norms and the Grundnorm provide a structured account of legal validity without relying on morality or an unlimited sovereign. Its strongest application is in constitutional systems where lower norms derive authority from higher constitutional norms.
For Indian law students, Kelsen provides a useful conceptual model for constitutional supremacy, judicial review, delegated legislation and the relationship between different levels of legal authority. Its limitations should nevertheless be recognised: legal systems are influenced by social practice, constitutional conventions, judicial creativity and normative values that cannot always be captured by a purely formal hierarchy.
Academic note: This material is intended for legal education and examination preparation. Students should consult prescribed jurisprudence texts and official constitutional materials for authoritative study.