Ronald Dworkin

Introduction

Ronald Dworkin (1931–2013) developed the most powerful critique of legal positivism and the most distinctive alternative theory of law: law as integrity. Taking aim at H.L.A. Hart’s positivism, Dworkin argued that law includes not only rules but also principles, and that adjudication involves interpretive judgment rather than mechanical application or discretionary lawmaking. His work transformed legal philosophy in the English-speaking world. Professor of Jurisprudence at Oxford and later at New York University, Dworkin brought together jurisprudence, constitutional theory, and moral philosophy in an integrated vision of law as a branch of political morality.

The Critique of Positivism: Principles and Discretion

Dworkin attacked the positivist claim that law consists solely of rules identified by a pedigree test (the rule of recognition). In cases like Riggs v. Palmer (1889, where a murderer was denied inheritance despite a literal will) and Henningsen v. Bloomfield Motors (1960, where contract terms were held unenforceable as unconscionable), courts relied on principles—standards of justice, fairness, and morality—rather than rules. These principles are part of law, Dworkin argued, but they cannot be identified by pedigree; they are identified by their fit with and justification of the legal system’s institutional history. Principles have a dimension of weight that rules lack: they guide decisions without determining them absolutely.

Hard Cases and Judicial Discretion

Hart argued that in hard cases—where legal rules run out—judges exercise discretion to create new law. Dworkin rejected this. Judges never have discretion in the strong sense (freedom from binding standards). In hard cases, judges must find the answer that best fits and justifies the legal materials—the “right answer” thesis. Dworkin illustrated this through the mythical judge Hercules, who possesses superhuman knowledge of legal materials and can construct the most coherent interpretation of the entire legal system. Hercules shows that even in the hardest cases, law provides a single right answer, though fallible human judges may disagree about what it is. The right answer thesis does not claim that answers are demonstrably correct but that there is a right answer to be found, not invented.

Law as Integrity

Dworkin’s positive theory, developed in Law’s Empire (1986), is law as integrity. Law consists of the set of principles that best (1) fit the institutional history of the legal system and (2) justify that history by showing it in its best moral light. Interpretation is constructive: the interpreter imposes purpose on an object to make it the best example of its genre. Legal interpretation is analogous to literary interpretation—a judge resembles a novelist writing a chain novel, obliged to make the best sense of what has come before while continuing the story. Law as integrity requires judges to decide cases consistently with the principles that best justify the legal system as a whole, ensuring that like cases are treated alike and that law speaks with one voice.

The Three Stages of Interpretation

Dworkin distinguished three stages of interpretation. Pre-interpretive stage: the interpreter identifies the raw data of the practice—the statutes, precedents, and conventions that constitute the legal materials. Interpretive stage: the interpreter settles on a general justification for the practice—a set of principles that best explains and justifies the data. Post-interpretive stage: the interpreter adjusts their view of what the practice actually requires in light of the justification adopted. This account explains how legal interpretation is both constrained (by the data) and creative (in constructing justifications).

Rights Thesis

Dworkin argued that individuals have rights against the state that are not exhausted by positive law. In Taking Rights Seriously (1977), he defended the “rights thesis” : in hard cases, parties have legal rights grounded in the principles that best justify the legal system. These rights are trumps over utilitarian justifications. A judge may not sacrifice an individual’s rights to promote the general welfare. This conception of rights as trumps has been enormously influential in constitutional theory, providing a framework for understanding judicial review and the protection of minority rights against majoritarian legislation.

The Unity of Value

In later work, Dworkin argued for the unity of value—the thesis that all genuine values (justice, fairness, equality, liberty) are mutually supportive and ultimately coherent. There are no irresolvable conflicts of value; apparent conflicts are illusions that better interpretation can dissolve. This claim connects Dworkin’s legal philosophy to his broader moral and political theory and challenges the value pluralism that dominates much contemporary philosophy. In Justice for Hedgehogs (2011), Dworkin developed a comprehensive account of moral responsibility, ethical value, and political justice unified by the interpretive method.

Dworkin on Equality

Dworkin’s political philosophy centers on a distinctive conception of equality. In Sovereign Virtue (2000), he developed the theory of equality of resources, arguing that a just distribution is one that is “ambition-sensitive” (rewarding choices) but “endowment-insensitive” (compensating for unchosen circumstances). This is implemented through a hypothetical insurance market: a just society would redistribute resources to the level that rational individuals would insure against the risk of being disadvantaged. Dworkin rejected equality of welfare (which is subjective and expensive) and strict equality of outcomes (which ignores personal responsibility). His theory of equality informs his constitutional jurisprudence, particularly arguments for the right to equal concern and respect as the foundational principle of liberal constitutionalism.

Legacy

Dworkin’s work reshaped jurisprudence. His critique forced Hart to revise his theory in the Postscript to The Concept of Law. Law as integrity remains a leading rival to positivism, defended and developed by scholars such as Nicos Stavropoulos and Jeremy Waldron. His work on judicial interpretation influenced constitutional theory worldwide, particularly in Canada, South Africa, Israel, and India. The “right answer” thesis continues to provoke debate about the nature of adjudication. Dworkin established that legal philosophy must engage with interpretive theory, political morality, and the nature of adjudication. His insistence that law is a branch of political morality—that questions about the content of law are ultimately moral questions—remains the most powerful challenge to legal positivism.