Legal Theory Lexicon

First year law students encounter many important concepts for the first time in their torts course. The “reasonable person” and Learned Hand’s formula appear in the Carroll Towing case. The mysteries of causation are introduced in Palsgraf. And debates over whether negligence or strict liability should provide the standard for imposing liability introduce important debates in normative legal theory. Behind these doctrinal questions lies tort theory.

The doctrinal questions of tort law prompt deeper theoretical questions of tort theory. Why does the law require some people to pay damages to others for the harms they cause? What kinds of conduct should trigger liability? When the law does impose liability, what is it really doing—compensating victims, deterring dangerous behavior, or giving expression to some idea of justice between the parties? What normative theory should guide tort doctrine, consequentialism, deontology, or something else? Tort theory aims to provide systematic answers to these questions and others.

This entry in the Legal Theory Lexicon provides an overview of the major theoretical approaches to tort law. As always, the Lexicon is aimed at law students, especially first-year students with an interest in legal theory.

Let’s begin with the most basic questions. What is a tort? And what is a theory of tort law?

What Is Tort Theory?

A tort is a civil wrong, other than a breach of contract, for which the law provides a remedy—typically money damages. The core of the first-year course is the law of negligence, but the field also includes intentional torts (battery, trespass, defamation) and various forms of strict liability (liability for abnormally dangerous activities, products liability). Tort theory asks what, if anything, holds this body of law together and what justifies it.

It is useful to distinguish four kinds of question that tort theorists ask.

The first is the question of justification: why should the law impose liability at all? When a defendant injures a plaintiff, the law might do nothing, leaving the loss where it falls. Or it might provide compensation through some public scheme, as workers’ compensation systems and the New Zealand accident compensation scheme do. Tort liability is a particular response—it requires one private party to pay another—and that response calls for justification.

The second is the question of the standard of conduct: what must a defendant have done, or failed to do, to be held liable? The central divide here is between fault and strict liability. A fault standard holds defendants liable only when they have behaved wrongfully—most often, negligently. A strict-liability standard holds defendants liable for the harms they cause regardless of whether they took reasonable care. Much of tort theory is an argument about which standard is appropriate, and why.

The third is the question of remedy: when liability is established, what should the defendant be required to do, and why? Tort law’s standard remedy is compensatory damages measured by the plaintiff’s loss. But theorists disagree sharply about what this remedy is for. Is it a device for spreading or deterring losses, or is it the law’s way of undoing a wrong as between the two parties?

The fourth is a question that helps fix the boundaries of the field: how and why is tort liability different from criminal punishment? Both tort and criminal law respond to wrongful conduct, and the same act—a punch, a reckless drive—can give rise to both a tort suit and a criminal prosecution. But the two differ in structure. A criminal case is brought by the state and aims at punishment; a tort case is brought by the injured party and aims at compensation. The criminal defendant who is convicted pays a debt to society; the tort defendant who loses pays damages to the plaintiff. The standard of proof differs too: guilt must be proved beyond a reasonable doubt, while tort liability need only be established by a preponderance of the evidence. As we will see, this distinctive structure—a private plaintiff seeking a remedy against a private defendant—is something that some theories of tort treat as merely incidental and others treat as essential.

There are other questions as well. For example, tort law needs an account of causation—a topic that has its own Legal Theory Lexicon entry: Legal Theory Lexicon 020: Causation. This Lexicon entry focuses on the questions that have occupied tort theorists in recent years, but tort theory is a dynamic field: old questions sometimes fade into the background, and new questions become the focus of attention.

The discussion that follows focuses on some of the most important approaches to tort theory. They are presented here in roughly the order in which they came to prominence in the modern academic debate, beginning with the economic analysis of tort law that reshaped the field in the 1960s and 1970s.

Economic Theories of Tort Law

The economic analysis of law transformed the study of torts. On the economic approach, the central purpose of tort law is not to do justice between the parties but to promote efficiency—to minimize the total social costs associated with accidents. This idea was developed in different ways by Guido Calabresi, whose book The Costs of Accidents (1970) framed the problem of accident law as one of cost minimization, and by Richard Posner, who argued that the common law of negligence could be understood as if it were designed to produce efficient outcomes.

The economic approach begins from a simple observation: accidents are costly, but so is preventing them. This approach to tort law has its theoretical roots in the work of Ronald Coase; for an introduction to his approach, see Legal Theory Lexicon 002: The Coase Theorem. Driving more slowly reduces the risk of collisions but also makes everyone late. The goal, on this view, is not to eliminate accidents—that would be far too expensive—but to find the level of precaution at which the combined costs of accidents and accident avoidance are as low as possible. Tort law promotes this goal by giving potential injurers an incentive to take cost-justified precautions, and only cost-justified precautions. A related idea is that liability should sometimes be placed on the cheapest cost avoider—the party best positioned to prevent the harm at the lowest cost—because doing so gives the right party the incentive to act.

The most famous expression of this idea is the Hand formula, named for Judge Learned Hand. In United States v. Carroll Towing Co. (1947), Hand suggested that whether a defendant was negligent could be analyzed in terms of three variables: the burden of taking a precaution (B), the probability that harm would occur without it (P), and the magnitude of the harm if it did occur (L). On this analysis, a defendant is negligent when the burden of precaution is less than the expected harm it would prevent—that is, when B is less than P multiplied by L. The intuition is straightforward: it is unreasonable to fail to take a precaution that costs less than the harm it would avoid, and reasonable to forgo a precaution that costs more than it is worth. Economists read the Hand formula as an instruction to weigh the costs and benefits of precaution at the margin, and they treat it as evidence that negligence law is, at bottom, about efficient deterrence.

Economic theories come in several varieties and face several objections. Some economists emphasize deterrence (giving actors incentives to take care), while others emphasize loss spreading (placing losses on parties, such as manufacturers, who can distribute them across many transactions through prices and insurance). Critics object that the economic approach mismeasures or ignores values that tort law seems to care about—that it cannot easily account for the moral significance of wronging a particular person, and that its focus on aggregate social welfare sits uneasily with tort law’s bilateral structure, in which a particular plaintiff sues a particular defendant. It is this last objection that animates the corrective justice theories to which we now turn.

Corrective Justice Theories

Beginning in the 1980s, a number of theorists mounted a sustained challenge to the economic account, arguing that tort law is best understood not as an instrument of social policy but as an expression of corrective justice. The idea of corrective justice is ancient—it traces to Aristotle’s Nicomachean Ethics, which distinguished corrective justice (concerned with rectifying wrongful losses and gains between two parties) from distributive justice (concerned with the fair allocation of goods across society as a whole). The leading modern exponents include Ernest Weinrib, Jules Coleman, and Richard Wright.

The central claim of corrective justice theory is that tort law responds to a wrong done by one person to another, and that the defendant’s duty to repair the harm flows directly from the fact that the defendant wrongfully caused it. On Weinrib’s influential account, developed in The Idea of Private Law (1995), the structure of a tort case is correlative: the plaintiff and defendant are linked as the two parties to a single transaction, and the law’s job is to undo the wrong that runs between them. This bilateral structure is not, as the economist would have it, an awkward administrative feature to be explained away. It is the very point of the enterprise. Weinrib famously insisted that private law should be understood on its own terms rather than as a vehicle for external goals—a view often summarized by his remark that the only purpose of private law is to be private law.

Corrective justice theorists thus take seriously features of tort law that the economic approach struggles to explain: that the plaintiff must have been wronged, that the defendant must have caused the harm, and that the remedy runs from this defendant to this plaintiff rather than into a general compensation fund. Critics respond that corrective justice theory describes the form of tort law without justifying it—that it tells us tort law has a bilateral structure but does not explain why society should maintain such an institution rather than replacing it with a more efficient compensation scheme. The standard of conduct also remains contested: corrective justice theorists differ among themselves about whether the wrong at the heart of tort law requires fault or can rest on the mere causation of harm.

Civil Recourse Theory

A distinct and influential approach, developed primarily by John Goldberg and Benjamin Zipursky, is civil recourse theory. Civil recourse theory shares the corrective justice theorists’ conviction that tort law is about wrongs rather than efficient loss allocation, but it locates the heart of the matter somewhere different. On the civil recourse view, tort law does not impose a duty of repair on wrongdoers. Rather, it empowers those who have been wronged—it gives the victim of a tort a legal avenue of recourse against the person who wronged her.

The point is best seen by attending to the structure of a tort suit. Tort law does not automatically transfer money from injurers to victims. It gives the injured party the power to sue, and leaves it to her whether to exercise that power. This, Goldberg and Zipursky argue, is no accident. It reflects a principle with deep roots in political theory: when the state prohibits private violence and self-help, it owes those who are wronged an alternative—a civil action through which they can hold wrongdoers answerable. Tort law is the law’s substitute for private redress. This is where the contrast with criminal punishment, flagged earlier, becomes theoretically central: the criminal law vindicates the public interest through state prosecution, whereas tort law equips the private victim with a means of acting against the person who wronged her.

Civil recourse theory and corrective justice theory are close cousins, and the differences between them are subtle. Both insist that tort law concerns wrongs and that its bilateral structure is essential. The principal disagreement is over whether tort law is fundamentally about the wrongdoer’s duty to repair (corrective justice) or the victim’s power to obtain redress (civil recourse). Critics of both approaches sometimes wonder whether this difference makes a practical difference; defenders respond that it explains otherwise puzzling features of tort doctrine, such as the plaintiff’s freedom to decline to sue and the law’s insistence that the plaintiff personally have been wronged.

Rights-Based and Kantian Theories

Closely related to corrective justice, but worth distinguishing, are theories that ground tort law in a structure of individual rights. On these accounts, tort law protects the rights persons have against one another—rights to bodily integrity, to property, to reputation—and a tort is, at bottom, the violation of such a right. The remedy gives effect to the right by requiring the violator to answer for the violation.

Two strands deserve mention. The first is the Kantian account developed by Arthur Ripstein, who argues in Private Wrongs (2016) that tort law expresses a system of equal freedom: each person is entitled to independence from the choices of others, and torts are violations of that independence. On this view, the wrong in a tort is the defendant’s use of the plaintiff—or the plaintiff’s body or property—as a means to the defendant’s own ends, without the plaintiff’s consent. The second is the rights-essentialism of Robert Stevens, who argues in Torts and Rights (2007) that tort law is best understood as a law of rights and their infringement, and that damages substitute for the right that was violated. These theories share with corrective justice an emphasis on the relationship between the parties, but they place the concept of a right rather than the concept of a wrongful loss at the foundation.

A recurring example illuminates the rights-based perspective. In Vincent v. Lake Erie Transportation Co. (1910), a ship’s owner deliberately kept the ship tied to a dock during a storm to save the ship, and the dock was damaged as a result. The court held the shipowner liable for the damage even though keeping the ship moored was reasonable—indeed, the privilege of necessity made it lawful. Rights-based theorists find this result congenial: the dock owner’s property right was infringed, and the infringement called for compensation, even though the defendant acted reasonably. The case is a puzzle for any theory that ties liability tightly to wrongful conduct, and it remains a favorite battleground among tort theorists.

Mixed, Pluralist, and Instrumentalist Theories

Not every theorist believes that tort law has a single unifying purpose. Many take a pluralist or mixed view, holding that tort law serves several aims at once—deterrence, compensation, corrective justice, the vindication of rights—and that no monistic theory captures the whole. Others defend frankly instrumentalist accounts, treating tort law as one policy tool among many for managing the social problem of accidents.

Several positions fall under this heading. Gregory Keating has developed accounts that draw on contractualist moral theory, asking which risk-imposing arrangements could be justified to all affected by them, and using that idea to illuminate the line between negligence and strict liability. The mid-twentieth-century enthusiasm for enterprise liability—the idea that businesses should bear the accident costs of their activities because they are well placed to spread those costs—reflects an instrumentalist sensibility, as does much of modern products-liability law. And some theorists argue that the search for a single grand theory is misguided: tort law, on this view, is a historically evolved institution that does several jobs imperfectly, and the theorist’s task is to understand and improve it rather than to reduce it to one idea. Kenneth Simons exemplifies a related analytic sensibility: rather than defending a single master theory, he has dissected the building blocks of tort law—the concept of negligence, the role of mental states, the consensual rationale for assumption of risk—in ways that cut across the economic and corrective justice camps.

Pluralism has obvious attractions—it fits the messy reality of tort doctrine—but it faces a challenge of its own. A theory that says tort law serves many values must also tell us how to proceed when those values conflict, as they frequently do. Without an account of how the competing aims are to be weighed, pluralism risks describing the disagreement rather than resolving it.

Critical and Distributive Perspectives

A final family of approaches steps outside the internal debate among economists, corrective justice theorists, and rights theorists to ask broader questions about tort law’s social role. Theorists working in the critical legal studies tradition, in feminist legal theory, and in the study of law and inequality have argued that tort law’s apparently neutral concepts—the “reasonable person,” the measure of damages by lost earnings—can encode and reproduce existing social hierarchies. When damages for lost future income are calculated using gender- or race-based wage tables, for example, the law may entrench the very inequalities it purports to ignore.

These perspectives raise the question of distributive justice—the fair allocation of resources and risks across society—which the dominant theories of tort largely set to one side. Most corrective justice theorists insist that distributive questions, however important, belong to other parts of the legal system (taxation, social welfare) rather than to tort law. Critics reply that this division of labor is itself a choice with distributive consequences, and that tort law cannot be neatly insulated from questions about who bears the burdens of accidents in an unequal society. This entry treats these perspectives briefly, but they form an important counterpoint to the theories surveyed above.

Cross-Cutting Doctrinal Questions

Several doctrinal questions cut across the theoretical debates and offer good test cases for any theory of tort.

The first is the choice between negligence and strict liability, already introduced above. Why does the law require fault in some domains (most ordinary accidents) but not in others (abnormally dangerous activities, defective products)? Economic theorists explain the choice in terms of incentives and activity levels; corrective justice and rights theorists explain it in terms of the kind of wrong involved. The objective character of the negligence standard is itself a puzzle: in Vaughan v. Menlove (1837), the court held a defendant to the standard of a reasonable person even though he may have done his honest best given his limited intelligence. Why should tort law judge defendants by an external standard rather than by their individual capacities? Each theory must say something about this. Kenneth Simons has examined these questions with particular care, distinguishing the “conduct negligence” that dominates tort law from the “cognitive negligence” more central to criminal law, and analyzing the several institutional functions that an objective negligence standard serves. His work on the consensual rationale for assumption of risk—the idea that a plaintiff who knowingly and voluntarily confronts a risk may have no claim—further illuminates how the law weighs the choices of victims, not just the conduct of injurers.

A second question concerns causation. Tort liability ordinarily requires that the defendant’s conduct have caused the plaintiff’s harm, but causation raises notorious difficulties—both factual (would the harm have occurred anyway?) and legal (is the harm too remote, or too unforeseeable, to count?). The famous case of Palsgraf v. Long Island Railroad Co. (1928) crystallizes the problem of proximate cause and the related question of the duty of care: to whom is a careless defendant answerable, and for which consequences? Theories of tort are tested by how well they explain why the law draws the lines it does.

A third question concerns the measure of damages. If tort law aims at deterrence, damages should be set at the level that gives optimal incentives. If it aims at corrective justice, damages should restore the plaintiff to the position she occupied before the wrong. If it aims at the vindication of rights, damages should substitute for the right infringed. These aims do not always point in the same direction, and the law of damages—compensatory, punitive, nominal—remains a fertile field for theoretical disagreement.

Conclusion

Tort theory is a debate about what a whole field of law is for. The economic approach sees tort law as a system for minimizing the costs of accidents; corrective justice theory sees it as an institution for rectifying wrongs between persons; civil recourse theory sees it as the law’s provision of an avenue of redress to those who have been wronged; rights-based theories see it as the protection and vindication of individual rights; and pluralists deny that any single account can capture the whole. For the first-year student, the value of these theories is not that one of them is simply correct, but that each illuminates features of the doctrine that might otherwise pass unnoticed—and that learning to see tort law through these competing lenses is itself a central part of learning to think like a lawyer.

Related Lexicon Entries

• Legal Theory Lexicon 001: Ex Ante & Ex Post
• Legal Theory Lexicon 002: The Coase Theorem
• Legal Theory Lexicon 004: The Reasonable Person
• Legal Theory Lexicon 008: Utilitarianism
• Legal Theory Lexicon 010: Deontology
• Legal Theory Lexicon 018: Justice
• Legal Theory Lexicon 020: Causation
• Legal Theory Lexicon 049: Distributive Justice
• Legal Theory Lexicon 052: Property Rules and Liability Rules
• Legal Theory Lexicon 060: Efficiency, Pareto, and Kaldor-Hicks
• Legal Theory Lexicon 061: Feminist Legal Theory
• Legal Theory Lexicon 113: Property Theory
• Legal Theory Lexicon 114: Contract Theory

Bibliography

• Guido Calabresi, The Costs of Accidents: A Legal and Economic Analysis (1970).
• Ronald H. Coase, The Problem of Social Cost, 3 Journal of Law and Economics 1 (1960).
• Jules L. Coleman, Risks and Wrongs (1992).
• John C.P. Goldberg & Benjamin C. Zipursky, Recognizing Wrongs (2020).
• Gregory C. Keating, Reasonableness and Rationality in Negligence Theory, 48 Stanford Law Review 311 (1996).
• Richard A. Posner, A Theory of Negligence, 1 Journal of Legal Studies 29 (1972).
• Arthur Ripstein, Private Wrongs (2016).
• Kenneth W. Simons, Assumption of Risk and Consent in the Law of Torts: A Theory of Full Preference, 67 Boston University Law Review 213 (1987).
• Kenneth W. Simons, Dimensions of Negligence in Criminal and Tort Law, 3 Theoretical Inquiries in Law 283 (2002).
• Ernest J. Weinrib, The Idea of Private Law (1995).
• Richard W. Wright, Right, Justice, and Tort Law, in Philosophical Foundations of Tort Law (David G. Owen ed., 1995).

The current version of this entry was created on June 9, 2026.

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Legal Theory Lexicon 115: Tort Theory

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Introduction

Contracts is a foundational course, almost always included in the first semester of the first-year curriculum in American law schools. Although the focus of contracts courses is usually doctrine, theoretical questions inevitably arise: What is a contract? Why does the law enforce promises? What gives a contractual obligation its force? Should the law of contract aim at efficiency, autonomy, fairness, or some combination of values? These are the questions of contract theory, a vibrant subfield of private law theory. This entry in the Legal Theory Lexicon provides an overview of the major theoretical approaches to contract law. As always, the Lexicon is aimed at law students, especially first-year students with an interest in legal theory.

What Is Contract Theory?

The phrase “contract theory” is used in several distinct ways. In legal theory and jurisprudence, “contract theory” refers to philosophical, doctrinal, and economic accounts of the law of contract: why contractual obligations should be legally enforceable, what remedies should be available, how courts should interpret agreements, and what substantive limits the law should place on freedom of contract. But in economics, “contract theory” refers to the formal study of how parties design agreements under conditions of asymmetric information and incomplete contracting.

Incomplete contracts are not the primary topic of this entry, but some of the ideas from that literature are discussed in Legal Theory Lexicon 050: Default Rules and Completeness. The idea of a complete contract is an idealization; we imagine a contract with a vast number of provisions such that all possible contingencies are addressed by explicit contractual language. Actual contracts are incomplete, giving rise to gaps, which contract law can fill with default rules, providing a rule to address the contingencies that the contract itself does not cover. For example, contract law provides default rules governing damages for breach of contract. In addition to default rules, contract law also includes mandatory rules — which cannot be overridden by explicit contractual provisions. Contract doctrines that foreclose legal enforcement of contracts for performance that is contrary to law or contrary to public policy are examples of mandatory rules. The distinction between default rules and mandatory rules is one of the most useful analytic tools provided by contract theory. It is useful to distinguish three kinds of question that contract theorists ask. Descriptive questions ask what contract law actually is and how it has developed. Doctrinal questions ask how the rules and principles of contract law fit together as a coherent body. Normative questions ask what contract law should be — what its justifying aims are and how it should be reformed in light of those aims. Many contract theories address all three questions and cleanly distinguish between them. But sometimes the conceptual distinctions between description, doctrine, and normativity are blurred.

The Will Theory and the Move to Objectivity

The classical theory of contract, dominant in nineteenth-century treatises and case law, grounded contractual obligation in the will of the parties. On this view — often called the will theory — a contract is a meeting of the minds, and what the law enforces is the parties’ joint intention to create a binding obligation. Theophilus Parsons’s Law of Contracts, first published in 1853, was the standard American treatise of the period and systematized the doctrines of offer, acceptance, and consideration that gave the will theory its doctrinal architecture in American legal thought. The will theory came under sustained attack in the late nineteenth and early twentieth centuries. Oliver Wendell Holmes argued that the law could not look inside the minds of contracting parties and must instead attend to their external manifestations. The resulting objective theory of contract asks not what the parties subjectively intended but what a reasonable person in the position of the addressee would have understood the speaker to mean. Samuel Williston’s Treatise on the Law of Contracts, first published in 1920, consolidated the classical doctrinal apparatus within this objective framework. The shift from the will theory to the objective theory is one of the central episodes in the history of contract doctrine, and it sets the stage for many of the debates that follow. Holmes’s impossibility-of-mind-reading argument is sometimes taken as gospel, but it is far from clear that he was correct. Work in the philosophy of mind treats mindreading — the attribution of beliefs, desires, and intentions to others — as a ubiquitous feature of ordinary human social cognition, and common sense confirms that we constantly reconstruct the mental states of those with whom we interact. The law itself routinely assesses subjective mental states. Tort doctrine distinguishes intentional torts from negligent ones, and criminal law makes fine-grained distinctions among purpose, knowledge, recklessness, and negligence in defining the mens rea required for various offenses. If juries can reliably determine whether a defendant intended to kill, there is no obvious reason they cannot determine whether a contracting party intended to be bound. The case for objectivity in contract law, on this reading, must rest on something other than the bare claim that subjective intent is epistemically inaccessible.

Promise Theory

The most prominent contemporary defense of an autonomy-based account of contractual obligation is Charles Fried’s Contract as Promise. Fried argues that contracts are legally enforceable because promises generate moral obligations and the law of contract is the legal recognition of that moral fact. The grounding is broadly Kantian: by making a promise, the promisor invokes a moral convention that allows her to create reasons for others to act, and the practice of promising is itself a way of treating others as autonomous agents capable of being bound by their own commitments. Promise theory faces several well-known objections. Critics question whether the law of contract really tracks the moral law of promising — the law enforces only a subset of promises, and the standard remedy of expectation damages does not obviously map onto what promissory morality requires. The most influential contemporary statement of this critique is Seana Shiffrin’s divergence thesis, which is our next topic.

The Divergence of Contract and Promise

Seana Shiffrin’s The Divergence of Contract and Promise has emerged as one of the most influential challenges to Fried’s promise theory and, more broadly, to any view that treats the law of contract as the legal embodiment of the moral practice of promising. Shiffrin’s central claim is that contract and promise diverge in important normative respects: contract law enforces only a subset of promises, provides remedies — especially expectation damages — that diverge from what promissory morality would require, and imposes formation and enforcement rules that a faithful legal articulation of promissory morality would not endorse. The argument has both critical and constructive dimensions. The critical dimension targets theories that treat contract as the law of promising and shows that such theories do not fit many particular contract doctrines. The constructive dimension argues that contract law should at least be accommodating of the moral conditions of autonomous agency — that the law should not require or encourage people to violate the morality of promising in order to comply with contract doctrine. Shiffrin’s framework has reoriented a substantial part of the contemporary debate, and many autonomy-based theorists now position themselves with respect to her views.

Consent and Transfer Theories

A related but distinct family of theories grounds contractual obligation in consent rather than promise. Randy Barnett’s A Consent Theory of Contract argues that contracts are enforceable because the parties consent to the transfer of alienable rights. On this view, the question is not whether a promise has been made but whether the promisor has manifested consent to be legally bound. Consent theory is naturally compatible with the objective theory of contract: what matters is manifested consent, not consent in some inner sanctum of the will. A more radical variant is the title-transfer theory developed by Murray Rothbard and Williamson Evers and elaborated in libertarian legal theory. On this view, every enforceable contract is a transfer of property rights, and what cannot be analyzed as a transfer of an alienable right is not a contract at all. The title-transfer theory has limited acceptance in mainstream legal academia but is important in libertarian and Austrian-economic approaches to contract theory.

Reliance Theory

A third family of theories grounds contractual obligation in reliance rather than promise or consent. The locus classicus is Lon Fuller and William Perdue’s The Reliance Interest in Contract Damages, which distinguished among three interests that contract law might protect: the restitution interest (preventing unjust enrichment), the reliance interest (compensating losses incurred in reliance on a promise), and the expectation interest (putting the promisee in the position she would have occupied had the contract been performed). Fuller and Perdue argued that the reliance interest has the strongest normative pull, and the argument has shaped contract scholarship ever since. Reliance theory received its most influential modern statement in Patrick Atiyah’s The Rise and Fall of Freedom of Contract. Atiyah argued that the will theory was a nineteenth-century construction and that contract law has always been more closely connected to actual reliance and benefits received than the executory-promise model suggests. Reliance theory has obvious affinities with the doctrine of promissory estoppel, codified in Section 90 of the Restatement (Second) of Contracts.

Economic Theories

The law-and-economics movement has produced a large literature on contract law. The core claim is that contract rules should be evaluated by their consequences for efficiency, understood either as Pareto efficiency or as wealth maximization in the Kaldor-Hicks sense. For more on these concepts, see Legal Theory Lexicon 060: Efficiency, Pareto, and Kaldor-Hicks. Richard Posner’s Economic Analysis of Law provides the canonical treatment, and the contract chapters of that book have shaped a generation of contract scholarship. Several themes recur in the economic literature. One is the theory of efficient breach: when performance would cost the promisor more than the promisee’s expectation interest, the promisor should breach and pay damages, producing an outcome that is at least Kaldor-Hicks superior to performance. A second is the theory of default rules: because contracts are inevitably incomplete, courts must fill gaps, and the choice of default rules has important efficiency consequences. Ian Ayres and Robert Gertner’s Filling Gaps in Incomplete Contracts draws the influential distinction between majoritarian default rules (the rules most parties would have chosen) and penalty default rules (rules designed to induce parties to bargain explicitly over the relevant term). A third theme is information forcing more generally — the use of contract doctrine to allocate the burdens of disclosure and investigation. Economic theory is sometimes presented as a unified normative account of contract law, but it is often more useful to treat it as a set of analytical tools that can be deployed within a variety of normative frameworks.

Corrective Justice Theories

Corrective justice theories ground contract law in the bilateral structure of the relationship between promisor and promisee. The most prominent contemporary corrective justice theorist is Ernest Weinrib, whose The Idea of Private Law argues that private law generally — including contract — should be understood as the legal articulation of corrective justice in the Aristotelian sense. Peter Benson’s Justice in Transactions offers a detailed corrective justice account focused on the transactional structure of contract formation. The central methodological commitment of corrective justice theories is that contract law cannot be explained or justified by reference to aggregate social goals such as wealth maximization. The law of contract is a system of correlative rights and duties between individual parties, and any adequate theory must respect that internal structure. Corrective justice theorists therefore frequently position themselves as critics of welfarist contract theory.

Relational Contract Theory

Relational contract theory, associated above all with Ian Macneil, emphasizes the embedded social context of contractual relationships. Macneil argued that classical contract doctrine assumed a model of discrete transactions between strangers — a model poorly suited to long-term commercial relationships, employment contracts, franchise arrangements, and other ongoing engagements. Relational theory urges attention to the norms, trust, and reciprocity that structure actual contractual behavior. Macneil’s most extended statement appears in The New Social Contract. Stewart Macaulay’s earlier empirical study Non-Contractual Relations in Business documented the gap between formal contract doctrine and the practices of business actors, who often resolve disputes without invoking legal remedies. Relational theory is descriptive and methodological as much as normative; it presses against theories that treat the discrete bargain as the paradigm of contract.

Distributive Justice and Critical Theories

A separate strand of contract theory focuses on the distributive consequences of contract law. Anthony Kronman’s Contract Law and Distributive Justice argued that distributive considerations are not foreign to contract law but are built into doctrines such as unconscionability, duress, and undue influence. Duncan Kennedy’s Form and Substance in Private Law Adjudication analyzed the choice between rules and standards in contract doctrine as bound up with deeper political and distributive disagreements. Critical legal studies, feminist legal theory, and critical race theory have each generated literatures on contract. The common move is to challenge the apparent neutrality of contract doctrine by exposing the background distributions of power and resources that shape what looks like voluntary exchange. Two influential examples are Clare Dalton’s An Essay in the Deconstruction of Contract Doctrine and Mary Joe Frug’s Re-Reading Contracts: A Feminist Analysis of a Contracts Casebook. These critiques are often combined with calls for greater attention to unconscionability, mandatory terms, and distributive concerns in the design of contract rules.

Autonomy Theories and Pluralism

Daniel Markovits and other contemporary theorists have developed autonomy-based accounts that differ from Fried’s promise theory in various respects. Markovits’s Contract and Collaboration emphasizes shared agency and the way in which contract enables parties to pursue joint projects through commitment. Other autonomy-based accounts focus on the conditions under which autonomous agents can rationally bind themselves and on the role of contract law in protecting the integrity of those conditions. These theories are unified by the thought that contract law concerns the conditions under which autonomous agents cooperate through commitment, but they differ on what that thought entails. Stephen Smith’s Contract Theory offers an explicitly pluralist account, arguing that no single value can fully justify the rules and doctrines of contract law and that an adequate theory must combine considerations of autonomy, reliance, efficiency, and corrective justice. Pluralist theories trade theoretical ambition for fit and concede that contract law is a complex institution serving multiple purposes.

Cross-Cutting Questions

Several questions cut across the major frameworks. What is the proper measure of damages — expectation, reliance, or restitution? When should courts enforce liquidated damages clauses, and when should they refuse to do so as penalties? How should courts approach the interpretation of contracts, and what role should context, course of dealing, and trade usage play? When should mandatory terms override the parties’ express agreement? Each of these questions can be addressed within any of the theoretical frameworks discussed above, and one of the central tasks of contract theory is to work out the implications of each framework for these doctrinal problems.

Conclusion

Contract theory is a particularly rich field within legal theory because contract law touches so many central questions in moral, political, and economic philosophy. The first-year law student who works through the basic doctrines will find that almost every rule — from offer and acceptance to remedies and excuse — invites a theoretical question. The frameworks surveyed here provide a vocabulary for asking those questions and a map of the contemporary debates. Many of the most important developments in legal scholarship over the last fifty years have grown out of the encounter between traditional contract doctrine and one or another of these theoretical perspectives.

Related Lexicon Entries

• Legal Theory Lexicon 042: Consent
• Legal Theory Lexicon 049: Distributive Justice
• Legal Theory Lexicon 050: Default Rules and Completeness
• Legal Theory Lexicon 052: Property Rules and Liability Rules
• Legal Theory Lexicon 060: Efficiency, Pareto, and Kaldor-Hicks
• Legal Theory Lexicon 113: Property Theory

Bibliography

• Patrick S. Atiyah, The Rise and Fall of Freedom of Contract (Clarendon Press, 1979).
• Ian Ayres & Robert Gertner, Filling Gaps in Incomplete Contracts: An Economic Theory of Default Rules, 99 Yale Law Journal 87 (1989).
• Randy E. Barnett, A Consent Theory of Contract, 86 Columbia Law Review 269 (1986).
• Peter Benson, Justice in Transactions: A Theory of Contract Law (Harvard University Press, 2019).
• Peter Benson (ed.), The Theory of Contract Law: New Essays (Cambridge University Press, 2001).
• Arthur L. Corbin, Corbin on Contracts (Joseph M. Perillo et al. eds., rev. ed., LexisNexis 1993–).
• Clare Dalton, An Essay in the Deconstruction of Contract Doctrine, 94 Yale Law Journal 997 (1985).
• Melvin A. Eisenberg, Foundational Principles of Contract Law (Oxford University Press, 2018).
• Charles Fried, Contract as Promise: A Theory of Contractual Obligation (2d ed., Oxford University Press, 2015).
• Mary Joe Frug, Re-Reading Contracts: A Feminist Analysis of a Contracts Casebook, 34 American University Law Review 1065 (1985).
• Lon L. Fuller & William R. Perdue, Jr., The Reliance Interest in Contract Damages, 46 Yale Law Journal 52 (1936).
• Alvin I. Goldman, Simulating Minds: The Philosophy, Psychology, and Neuroscience of Mindreading (Oxford University Press, 2006).
• Duncan Kennedy, Form and Substance in Private Law Adjudication, 89 Harvard Law Review 1685 (1976).
• Jody S. Kraus, Philosophy of Contract Law, in The Oxford Handbook of Jurisprudence and Philosophy of Law 687 (Jules Coleman & Scott Shapiro eds., Oxford University Press, 2002).
• Anthony T. Kronman, Contract Law and Distributive Justice, 89 Yale Law Journal 472 (1980).
• Stewart Macaulay, Non-Contractual Relations in Business: A Preliminary Study, 28 American Sociological Review 55 (1963).
• Ian R. Macneil, The New Social Contract: An Inquiry into Modern Contractual Relations (Yale University Press, 1980).
• Daniel Markovits, Contract and Collaboration, 113 Yale Law Journal 1417 (2004).
• Daniel Markovits & Emad H. Atiq, Philosophy of Contract Law, in Stanford Encyclopedia of Philosophy (Edward N. Zalta ed., Winter 2021 Edition).
• Theophilus Parsons, The Law of Contracts (Little, Brown 1853).
• Richard A. Posner, Economic Analysis of Law (9th ed., Wolters Kluwer, 2014).
• Alan Schwartz & Robert E. Scott, Contract Theory and the Limits of Contract Law, 113 Yale Law Journal 541 (2003).
• Seana Valentine Shiffrin, The Divergence of Contract and Promise, 120 Harvard Law Review 708 (2007).
• Stephen A. Smith, Contract Theory (Oxford University Press, 2004).
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• Samuel Williston & Richard A. Lord, A Treatise on the Law of Contracts (Williston on Contracts) (4th ed., West 1990–).

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Legal Theory Lexicon 114: Contract Theory

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Property is almost always a first year subject. Decades ago, it was most likely a year-long course, but today the course is typically offered in the Fall or Spring. The 1L property course typically begins with possession (capture cases like Pierson v. Post), moves through estates in land and future interests, and then takes up landlord-tenant law, easements, servitudes, nuisance, and (in some courses) takings. Along the way, students encounter a familiar metaphor: property is a “bundle of sticks.” Each stick represents a particular legal entitlement — the right to possess, the right to use, the right to exclude, the right to transfer, and so on. The bundle metaphor is the conceptual default in most casebooks. But the metaphor is also contested. In this Lexicon entry, I introduce the major theoretical approaches to property: the bundle of rights tradition, the new essentialism, architectural theory, law and economics, personhood theory, and progressive property. As always, the entry is written with first-year law students in mind.

Property theory is a big topic — so, this entry is necessarily selective and simplified! Many interesting topics will be left out, including interpretation of the Takings Clause, intellectual property, and more sophisticated economic theories of property.

A word on terminology. “Property” covers three regimes: common property (resources available for use by all members of a community, like a town green or a public park), collective property (resources whose use is determined by the community as a whole, like a military base or a state-owned enterprise), and private property (resources assigned to particular individuals, like a home or a car). This entry focuses on private property; common and collective property are not considered in depth.

Early Foundations: Locke, Blackstone, and Hume

The philosophical engagement with property predates the modern legal tradition by two millennia — Aristotle argued in the Politics that private property promotes virtues like prudence and responsibility, and Thomas Aquinas held that the rich have moral obligations to the poor that qualify any defense of private ownership. But the Anglo-American legal tradition’s modern engagement could be said to begin with John Locke and William Blackstone. Locke’s Second Treatise of Government (1689) begins with the idea of a “state of nature” and advances the thesis that in such a state real property can be acquired by individuals who mix their labor with the land, for example, by clearing a field and planting a crop. Locke’s theory included the famous “Lockean Proviso,” which stipulates that the right to acquire property is contingent on leaving “as much and as good” for others.

Another important development in property theory is associated with the works of William Blackstone. In his Commentaries on the Laws of England (1765–1770), Blackstone offered the following conception: property is “that sole and despotic dominion which one man claims and exercises over the external things of the world, in total exclusion of the right of any other individual in the universe.” The “sole and despotic dominion” passage is the canonical statement of what is sometimes called the dominium conception (the idea that ownership is a unitary, absolute relation between a person and a thing). Blackstone himself qualified the claim in subsequent passages, and David Schorr has shown that the so-called “Blackstonian conception” departs in important respects from Blackstone’s own account of property in the Commentaries — but the rhetoric stuck. The bundle of sticks tradition, discussed below, developed in part as a reaction against the Blackstonian picture.

A third foundational figure is David Hume. In A Treatise of Human Nature (1739–1740), Hume argued that property is neither natural nor independent of social arrangements. There is no natural “mine” or “thine” — what counts as property is fixed by social convention, which emerges because the alternative is endless conflict over scarce resources. On Hume’s view, an individual’s relation to a thing becomes a property relation only once a society has stabilized expectations about possession; until then, there are objects and there are people who hold them, but there is no property. The Humean account anticipates two important strands in later property theory: the relational view that property is a set of relations between persons (which the bundle theorists would develop), and the contemporary view, associated with Liam Murphy and Thomas Nagel, that property has no pre-political existence and therefore cannot supply a moral obstacle to redistribution. Hume’s text admits multiple interpretations, and contemporary scholarship continues to debate whether his account is best read as conventional in a thin sense or as naturalistically grounded in human nature.

The Bundle of Rights

Twentieth century property theory was profoundly influenced by the bundle of rights conception of property, associated with Wesley Newcomb Hohfeld, A.M. Honoré, and the American legal realists. The core idea is that property is not a single, unitary relation between a person and a thing. Property is instead a set of jural relations between persons with respect to things. The conception developed in three steps.

Hohfeld’s Analytical Framework. Hohfeld, in two articles published in the Yale Law Journal in 1913 and 1917, identified eight basic jural relations, arranged in correlative and opposite pairs: right/duty, privilege/no-right, power/liability, and immunity/disability. Hohfeld argued that talk of “ownership” or “title” obscures the underlying structure of legal relations. Once the Hohfeldian framework is applied, property is revealed as a complex of these elemental relations — rights to exclude others, privileges to use, powers to transfer, immunities against expropriation, and so on. The Hohfeldian framework is foundational; it set the stage for everything that followed. If you are interested in Hohfeld, see Hohfeld: Legal Theory Lexicon 034.

Honoré’s Eleven Incidents. A.M. Honoré’s essay Ownership (1961) catalogued the standard incidents of liberal ownership. Honoré identified eleven: the right to possess, the right to use, the right to manage, the right to the income, the right to the capital, the right to security, the incident of transmissibility, the incident of absence of term, the prohibition of harmful use, liability to execution for debt, and the residuary character of ownership. Honoré did not claim that all eleven incidents were necessary or sufficient for ownership. His point was that “ownership” picks out a cluster of incidents that typically travel together but are conceptually separable.

Legal Realism and the Restatement. The American legal realists embraced the bundle conception. Morris Cohen’s Property and Sovereignty (1927) used the framework to argue that property is a delegation of sovereign power, not a pre-political natural right. The Restatement (First) of Property (1936) adopted Hohfeldian terminology, defining property in terms of rights, privileges, powers, and immunities. By the middle of the twentieth century, the bundle picture had become the orthodox view in American legal academia.

Why the Bundle Picture Was Attractive. The bundle picture had several attractions. It dissolved the Blackstonian image of property as a unitary, absolute dominion. From the perspective of politically progressive realists, the bundle of rights approach had a further attraction: it conceptualized property as subject to regulation. If property is a bundle of separable sticks, the legislature can rearrange the sticks without disturbing some essential core.

The bundle of rights approach had another implication: it supported the relational view that property concerns relations between persons, not between persons and things. And it permitted fine-grained analysis of complex transactions — leases, easements, future interests, security interests — by treating each as a particular configuration of Hohfeldian relations.

The New Property

Charles Reich’s article The New Property (1964) extended the property concept in a new direction. Reich argued that old property (land, chattels, and intangibles such as bank accounts) had been joined by the new property (welfare benefits, occupational licenses, government contracts, subsidies, and franchises). The new property functioned as the modern equivalent of traditional property, providing the economic security that real and personal property once supplied. Reich’s argument depended on the bundle picture: once property is understood as a set of separable legal relations rather than a unitary dominion over tangible things, the extension to government entitlements becomes available. The doctrinal payoff came in Goldberg v. Kelly (1970), which held that the termination of welfare benefits required procedural due process. First-year students may encounter the new property in Civil Procedure, Constitutional Law, Legislation and Regulation, or Administrative Law.

The New Essentialism and the Right to Exclude

By the late 1990s, a reaction against the bundle picture had emerged. The reaction is sometimes called the “new essentialism,” because its proponents argued that property has an essence after all. The essence, on this view, is the right to exclude. The new essentialists argued that the right to exclude is what enables an owner to exercise the other incidents of ownership — to use, to manage, to transfer — because without the power to keep others off the resource, none of the remaining incidents can be reliably exercised.

If you want to learn about the new essentialism, Thomas Merrill’s article Property and the Right to Exclude (1998) is the place to start. Merrill argued that the right to exclude is not merely one stick among many but the irreducible core of the property concept. Take away the right to exclude, and what remains is no longer recognizable as property. Merrill’s argument was partly conceptual and partly historical: he showed that across diverse legal systems and historical periods, the right to exclude appears as the defining feature of property.

J.E. Penner, in The Idea of Property in Law (1997), developed a parallel view from within analytical jurisprudence. Penner argued that property is best understood as the right to use things, with exclusion as the negative formulation of that right. Property rights are in rem: they run against the world, not against particular individuals identified by name. The in rem character of property distinguishes it from contract, where rights run against identified counterparties. The bundle picture, by treating property as a collection of bilateral relations, obscured what Penner saw as a basic structural feature of property.

The new essentialism does not require a return to Blackstonian dominion. The exclusion theorists do not deny that property is subject to extensive regulation. Their claim is conceptual: whatever the precise contours of regulation, the right to exclude is what makes a legal relation a property relation rather than something else.

Henry Smith’s Architectural Theory

Henry Smith, often in collaboration with Thomas Merrill, has developed what is now called an architectural theory of property (earlier described as an information-cost theory). The theory has become an influential alternative to the bundle picture.

Smith’s starting point is a distinction between two strategies for delineating (i.e., defining) use rights: exclusion and governance. The exclusion strategy delegates use decisions to a single owner by erecting a boundary and excluding others from crossing it. The governance strategy specifies particular permitted or prohibited uses directly. Exclusion is informationally cheap: a dutyholder need only know “stay off” or “do not take.” Governance is informationally expensive: dutyholders must learn the specific rules that apply. Smith argues that property law economizes on information costs by relying on exclusion at the core — possession, alienation — while reserving governance for the periphery, in nuisance, servitudes, and regulatory regimes. The theory has clear normative implications. Because governance strategies are expensive, they must be justified by benefits that outweigh their costs.

On the architectural view, economizing on information costs is not the purpose of property; it is part of the analysis of means. The framework is compatible with multiple substantive ends — use, investment, the avoidance of conflict, and others — that property institutions serve in a world of complex interactions among persons with respect to resources. Smith has described himself as a normative pluralist in this sense: the architectural approach takes property to serve a plurality of ends rather than a single overarching value.

Two further ideas are central to Smith’s account. The first is modularity: property is organized into discrete units — the parcel of land, the chattel (material object) — which keep legal relations bounded and reduce what third parties must learn in order to comply with property rules. The second is the numerus clausus principle, the rule that property forms are limited to a closed set. On Smith’s account, the numerus clausus limits information costs across the system as a whole.

Smith’s contributions to property theory are among the most important developments in private law theory as a whole. If you are interested in the state of contemporary property theory, you must read Smith.

Property and Law and Economics

The economic analysis of property is a substantial body of scholarship, much of it independent of the debates between the bundle theorists and the new essentialists. Here are six of the most important ideas developed through an economic approach to property law.

The framework for most of this work is Ronald Coase’s analysis of social cost. Coase’s The Problem of Social Cost (1960) showed that, in a world without transaction costs, the initial allocation of legal entitlements does not affect the efficient use of resources: bargaining will reallocate entitlements to their highest-valued use. The corollary is the one that matters for property theory: in the real world, where transaction costs are positive, the initial allocation of rights matters, and the design of property institutions shapes how resources are used. The Coase Theorem is treated in Legal Theory Lexicon 002: The Coase Theorem.

Harold Demsetz’s Toward a Theory of Property Rights (1967) offered an account of the emergence of property institutions. Demsetz argued that property rights emerge when the benefits of internalizing externalities exceed the costs of defining and enforcing the rights. The classic illustration is the development of property rights in beavers among indigenous communities of Labrador in response to the European fur trade.

Guido Calabresi and A. Douglas Melamed’s Property Rules, Liability Rules, and Inalienability: One View of the Cathedral (1972) distinguished three modes of protecting legal entitlements. Property rules permit transfer only with the holder’s consent. Liability rules permit transfer at a price determined by an external decisionmaker. Inalienability rules forbid transfer altogether. The Calabresi-Melamed framework remains a standard analytical tool. For more, see Legal Theory Lexicon 052: Property Rules and Liability Rules.

Garrett Hardin’s The Tragedy of the Commons (1968) gave the field one of its most enduring frameworks. Hardin argued that resources held in common — pastures, fisheries, the atmosphere — tend toward overuse, because each user captures the full benefit of additional use while bearing only a fraction of the cost. The tragedy is collective: rational individual behavior produces collectively destructive outcomes. Hardin’s argument is a property-theoretic application of a more general structure familiar from the prisoner’s dilemma. For an introduction to that structure, see Legal Theory Lexicon 007: The Prisoners’ Dilemma.

Michael Heller’s The Tragedy of the Anticommons (1998) identified the mirror image of Hardin’s commons tragedy. When too many persons hold rights to exclude with respect to a single resource, the resource is underused. Heller’s work has been particularly influential in patent theory and post-socialist transition economies.

Elinor Ostrom’s Governing the Commons (1990) challenged the Hardin assumption that common-pool resources inevitably tend toward overuse. Ostrom documented many successful community-managed commons regimes and identified eight design principles for sustainable common-pool resource management. Ostrom was awarded the Nobel Prize in Economics in 2009. Ostrom’s framework has been extended to “cultural commons” — knowledge, scientific data, traditional knowledge, and other intangible resources — most prominently in the work of Charlotte Hess, Michael Madison, Brett Frischmann, and Katherine Strandburg.

Lee Anne Fennell’s Slices and Lumps (2019) addresses what she calls the configuration problem: how property law slices resources into parcels and lumps them into bundles. The size, shape, and divisibility of property entitlements shape what owners can do, what transactions are feasible, and what spillovers escape the boundary. Fennell’s earlier work develops related themes. The Unbounded Home (2009) examines the neighborhood effects and spillovers that cross parcel boundaries despite the legal fiction that the parcel is the relevant unit. Fee Simple Obsolete (2016) argues that the fee simple is poorly adapted to contemporary urban conditions and that property law would benefit from more flexible entitlement forms.

Personhood Theory

Margaret Jane Radin’s Property and Personhood (1982) drew on Hegelian themes to argue that some forms of property are constitutive of personhood. Radin distinguished personal property from fungible property. Personal property — one’s home, one’s wedding ring, one’s wheelchair — is bound up with the owner’s identity and self-development. Fungible property — a share of stock, a vacant lot held for investment — stands at arm’s length from the owner. Radin argued that personal property deserves stronger legal protection than fungible property.

Personhood theory has been influential in particular doctrinal pockets: the law of takings (where Radin’s framework supports stronger protection for homes than for commercial investments), the law of bankruptcy exemptions, and the debates over commodification of body parts, sexual services, and reproductive labor (the subject of Radin’s later book Contested Commodities).

Progressive Property

Another recent development is the “progressive property” movement, associated with Gregory Alexander, Eduardo Peñalver, Joseph William Singer, and Laura Underkuffler. The progressive property scholars share a commitment to grounding property in human flourishing, social obligation, and the public dimension of ownership.

The 2009 “Statement of Progressive Property,” coauthored by Alexander, Peñalver, Singer, and Underkuffler, set out the framework’s commitments. Property serves plural values: liberty, autonomy, human flourishing, democratic self-governance, and equal access to resources necessary for participation in social life. Owners owe obligations to the communities in which they hold property. Property law should reflect these values and obligations. Although this work is framed as “progressive,” similar ideas are present in both traditional natural law theory and in the more recent emergence of virtue jurisprudence, both of which emphasize human flourishing as the end or object of law. For more, see Legal Theory Lexicon 031: Virtue Jurisprudence.

Gregory Alexander’s Commodity and Propriety (1997) traced two competing traditions in American property thought: a commodity tradition emphasizing market exchange and individual autonomy, and a propriety tradition emphasizing the social role of ownership in sustaining the polity. Alexander’s later work, including Property and Human Flourishing (2018), develops an Aristotelian account of property grounded in objective human goods. Joseph Singer’s Entitlement: The Paradoxes of Property (2000) develops a relational account of ownership obligations. Eduardo Peñalver’s work, including (with Sonia Katyal) Property Outlaws (2010), examines the role of disobedience and dissent in property’s development.

The progressive property scholars are critical of the exclusion theorists. On their view, the new essentialism understates the social and relational dimensions of property, and elevates one value — autonomy understood as non-interference by others — over the plural values that property institutions ought to serve.

Other Approaches

Several additional approaches deserve brief mention. Arthur Ripstein’s Force and Freedom (2009) develops a Kantian theory of property grounded in the equal freedom of persons. On the Kantian view, property is necessary to give effect to the right of each person to set and pursue their own ends, but property requires a political community — a state — to be legitimate. Jeremy Waldron’s The Right to Private Property (1988) offers a careful philosophical reconstruction of the Lockean and Hegelian justificatory arguments. Adam Mossoff and other natural rights theorists have developed neo-Lockean accounts of property, often in connection with intellectual property. Stephen Munzer’s A Theory of Property (1990) develops a pluralist account grounded in three principles — utility and efficiency, labor-desert, and personality — and remains a leading book-length treatment of property’s normative foundations. Hanoch Dagan, in Property: Values and Institutions (2011), develops a pluralist account that recognizes multiple property forms serving distinct values.

A second cluster of work approaches property from outside the dominant philosophical traditions. Robert Ellickson’s Order Without Law (1991) examined how community norms substitute for formal property rights among ranchers in Shasta County, California. Carol Rose’s Property and Persuasion (1994) explored the rhetorical and narrative dimensions of property institutions, arguing that property depends on shared stories about acquisition and entitlement. Critical race theorists, beginning with Cheryl Harris’s Whiteness as Property (1993), have examined the racial dimensions of property institutions.

Conclusion

Property theory is now pluralistic. The bundle of sticks picture remains the default framework in most American casebooks, but it is no longer the unchallenged orthodoxy it was in the second half of the twentieth century. The exclusion theorists, the architectural theorists, the personhood theorists, the progressive property scholars, the law-and-economics scholars, and the Kantians offer competing accounts of what property is and what it is for.

One feature of the current landscape deserves emphasis. Normative pluralism — the view that property institutions serve a plurality of ends rather than a single overarching value — cuts across the schools surveyed above. It is not the exclusive commitment of the progressive property scholars; it is found among the architectural theorists, among the law-and-economics scholars, and among the philosophical pluralists discussed in the previous section. Monist positions, which ground property in a single value such as autonomy or efficiency, are correspondingly distributed across the landscape rather than concentrated in any one camp.

Here are three takeaways for first year law students — and maybe first time property law teachers or scholars as well. First, the bundle metaphor carries theoretical commitments; it is not a neutral description. The choice of metaphor reflects substantive commitments about whether property has an essential core. Second, much of first-year property doctrine reflects unstated theoretical commitments. The rules governing capture, finders, adverse possession, easements, and nuisance can be illuminated by asking which theory best explains them. Third, theoretical disagreements have doctrinal consequences. Whether a regulatory taking has occurred, whether a covenant runs with the land, whether a tenant may exclude the landlord — questions like these are answered differently depending on which theory of property one accepts.

Property theory is among the most active fields in contemporary legal theory. The first-year student who attends to the theoretical debates will find that the doctrine looks different — and more interesting — once the theoretical commitments are made explicit.

For a philosophical companion to this entry, the Stanford Encyclopedia of Philosophy’s entry on Property and Ownership by Jeremy Waldron is the standard introduction.

Related Lexicon Entries

• Legal Theory Lexicon 002: The Coase Theorem
• Legal Theory Lexicon 007: The Prisoners’ Dilemma
• Legal Theory Lexicon 027: Persons and Personhood
• Legal Theory Lexicon 028: Concepts and Conceptions
• Legal Theory Lexicon 029: Public and Private Goods
• Legal Theory Lexicon 031: Virtue Jurisprudence
• Legal Theory Lexicon 034: Hohfeld
• Legal Theory Lexicon 048: Libertarian Theories of Law
• Legal Theory Lexicon 049: Distributive Justice
• Legal Theory Lexicon 050: Default Rules and Completeness
• Legal Theory Lexicon 052: Property Rules and Liability Rules
• Legal Theory Lexicon 057: Realist Deconstruction of Formal Legal Categories
• Legal Theory Lexicon 058: Contractarianism, Contractualism, and the Social Contract
• Legal Theory Lexicon 060: Efficiency, Pareto, and Kaldor-Hicks

Bibliography

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Alexander, Gregory S. Property and Human Flourishing. New York: Oxford University Press, 2018.

Alexander, Gregory S., Eduardo M. Peñalver, Joseph William Singer, and Laura S. Underkuffler. A Statement of Progressive Property, 94 Cornell L. Rev. 743 (2009).

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Aristotle. Politics. Translated by Benjamin Jowett.

Blackstone, William. Commentaries on the Laws of England. Oxford: Clarendon Press, 1765-1770.

Calabresi, Guido, and A. Douglas Melamed. Property Rules, Liability Rules, and Inalienability: One View of the Cathedral, 85 Harv. L. Rev. 1089 (1972).

Coase, R.H. The Problem of Social Cost, 3 J.L. & Econ. 1 (1960).

Cohen, Morris R. Property and Sovereignty, 13 Cornell L.Q. 8 (1927).

Dagan, Hanoch. Property: Values and Institutions. New York: Oxford University Press, 2011.

Demsetz, Harold. Toward a Theory of Property Rights, 57 Am. Econ. Rev. 347 (1967).

Ellickson, Robert C. Order Without Law: How Neighbors Settle Disputes. Cambridge, MA: Harvard University Press, 1991.

Fennell, Lee Anne. The Unbounded Home: Property Values Beyond Property Lines. New Haven: Yale University Press, 2009.

Fennell, Lee Anne. Fee Simple Obsolete, 91 N.Y.U. L. Rev. 1457 (2016).

Fennell, Lee Anne. Slices and Lumps: Division and Aggregation in Law and Life. Chicago: University of Chicago Press, 2019.

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Honoré, A.M. Ownership. In A.G. Guest, ed., Oxford Essays in Jurisprudence, 107-147. Oxford: Oxford University Press, 1961.

Hume, David. A Treatise of Human Nature. London, 1739–1740.

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Merrill, Thomas W., and Henry E. Smith. Optimal Standardization in the Law of Property: The Numerus Clausus Principle, 110 Yale L.J. 1 (2000).

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Merrill, Thomas W., and Henry E. Smith. The Architecture of Property. In Hanoch Dagan and Benjamin C. Zipursky, eds., Research Handbook on Private Law Theory, 134–154. Cheltenham: Edward Elgar, 2020.

Mossoff, Adam. What is Property? Putting the Pieces Back Together, 45 Ariz. L. Rev. 371 (2003).

Munzer, Stephen R. A Theory of Property. New York: Cambridge University Press, 1990.

Murphy, Liam, and Thomas Nagel. The Myth of Ownership: Taxes and Justice. New York: Oxford University Press, 2002.

Ostrom, Elinor. Governing the Commons: The Evolution of Institutions for Collective Action. New York: Cambridge University Press, 1990.

Peñalver, Eduardo M., and Sonia K. Katyal. Property Outlaws: How Squatters, Pirates, and Protesters Improve the Law of Ownership. New Haven: Yale University Press, 2010.

Penner, J.E. The Idea of Property in Law. Oxford: Clarendon Press, 1997.

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Radin, Margaret Jane. Contested Commodities. Cambridge, MA: Harvard University Press, 1996.

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Waldron, Jeremy. Property and Ownership. In Stanford Encyclopedia of Philosophy, edited by Edward N. Zalta. First published September 6, 2004; substantive revision January 21, 2026.

Created May 25, 2026; Revised May 30, 2026. My thanks to Henry Smith for helpful comments on this Lexicon entry.

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Legal Theory Lexicon 113: Property Theory

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