School of ThoughtEarly modern period (17th century) with major roots in 17th–18th century European social contract theories and renewed development in late 20th-century moral philosophy

Contractualism

Contractualism (from Latin contractus; no distinct non-English original)
The term derives from Latin "contractus" (agreement or drawing together) and the suffix "-ism," indicating a system of thought. It designates views that ground moral or political norms in actual or hypothetical agreements, contracts, or principles that free and equal persons could not reasonably reject as a basis for informed, unforced general agreement.
Origin: Early formulations in early modern Western Europe (notably England, France, and the Netherlands); contemporary development centered in Anglophone academic philosophy.

Moral and political principles must be justifiable to each person as free and equal.

At a Glance

Quick Facts
Founded
Early modern period (17th century) with major roots in 17th–18th century European social contract theories and renewed development in late 20th-century moral philosophy
Origin
Early formulations in early modern Western Europe (notably England, France, and the Netherlands); contemporary development centered in Anglophone academic philosophy.
Structure
loose network
Ended
No formal dissolution; continues as an active contemporary research program (gradual decline)
Ethical Views

Ethically, contractualism holds that right and wrong depend on principles that no one could reasonably reject, understood as governing how we treat one another as free and equal moral persons. On Scanlon’s formulation, an act is wrong if it would be disallowed by any principle that no one could reasonably reject for general adoption. This makes moral reasons fundamentally relational: they arise from what we owe to each other, including obligations of fidelity, non-harm, fairness, and respect. Contractualism often yields strong protections for individual rights, constraints against using persons merely as means, and a focus on justifiability to the worst-off rather than maximizing aggregate welfare. While some versions lean toward deontology (emphasizing duties and constraints), others are more outcome-sensitive but still treat justifiability to persons—not impersonal value—as the ultimate standard.

Metaphysical Views

Contractualism is typically metaphysically modest or neutral: it does not posit special moral substances or non-natural entities but instead treats moral facts, if any, as grounded in or constituted by facts about the justifiability of principles to persons viewed as free and equal. Early modern social contract theorists (e.g., Hobbes, Locke) presupposed broadly realist metaphysical pictures of persons as self-interested agents in a "state of nature," while contemporary contractualists often adopt a thin metaphysics of persons as rational, reasonable, and capable of forming, revising, and pursuing conceptions of the good. Many contractualists either embrace a form of constructivism—where moral truths are constructed from a procedure of agreement—or leave open whether moral facts ultimately reduce to natural or normative facts that supervene on human practical reason.

Epistemological Views

Epistemologically, contractualism emphasizes public reason and justificatory procedures over intuition or revelation. Knowledge of moral and political principles is obtained by asking which rules could be justified to each person under appropriate conditions (e.g., full information, freedom from coercion, impartiality). This typically involves idealized thought experiments—such as Rawls’s original position behind a veil of ignorance or Scanlon’s test of reasonable rejectability—rather than empirical contracts. Contractualists tend to be fallibilists: moral knowledge is revisable in light of better arguments about what persons could reasonably accept. The view is often aligned with rationalist accounts of normativity, where sound moral beliefs are those we could endorse upon critical reflection within a shared, reasons-giving practice.

Distinctive Practices

As a primarily theoretical tradition, contractualism does not prescribe a distinctive daily lifestyle, but it encourages practices of public justification, democratic deliberation, and mutual accountability. In academic and civic contexts, adherents emphasize reason-giving, fair negotiation, consent-based institutional design, and scrutiny of social norms for whether they can be justified to those they affect, with special attention to marginalized or disadvantaged groups.

1. Introduction

Contractualism is a family of moral and political theories that ground the validity of norms in their justifiability to persons viewed as free and equal. Rather than beginning from an independent moral reality or from an aggregate measure of welfare, contractualist approaches ask which principles could be the object of an agreement among suitably characterized agents, or which could not be reasonably rejected by any such agent.

In its political form, contractualism is often expressed through social contract theories, which explain the legitimacy of political authority and obligations in terms of an (actual or hypothetical) agreement to establish common institutions and rules. These theories have historically been used to address questions about the origin of the state, the justification of obedience to law, and the distribution of basic rights and liberties.

In its specifically moral form, contractualism—especially as developed by T. M. Scanlon—focuses on what individuals owe to one another in everyday interaction. On this view, the rightness of actions depends on whether they accord with principles that no one could reasonably reject as a basis for informed, unforced general agreement. The central moral relation is thus justificatory: agents are required to be able to offer reasons for their actions and for social rules that others, as co-equal persons, could accept.

Despite significant variation, contractualist theories typically share several features: an emphasis on public justification, a commitment to the equal moral status of persons, and the use of hypothetical consent or agreement as a device for testing the acceptability of principles. Contemporary work extends contractualist ideas to issues of global justice, gender and racial equality, human rights, and institutional design, while also debating the adequacy of contract-based reasoning as a foundation for morality and politics.

2. Origins and Historical Development

Contractualism emerged in early modern Europe in response to religious conflict, the rise of centralized states, and the decline of traditional sources of political authority. Early social contract theorists sought a secular, rational basis for political obligation and legitimacy.

Early Modern Social Contract Theories

ThinkerKey WorkCentral Idea of the Contract
Thomas HobbesLeviathan (1651)Individuals leave a violent state of nature by authorizing an absolute sovereign to secure peace and self-preservation.
John LockeTwo Treatises of Government (1689)Individuals consent to government to better protect natural rights to life, liberty, and property, under limited and revocable authority.
Jean-Jacques RousseauDu contrat social (1762)Legitimate authority arises when individuals unite under the general will, preserving freedom through participation in collective self-legislation.

These theorists used contract ideas mainly to explain the origin and limits of political authority, not yet to give a general account of moral rightness.

Kant and the Transition to Moral Contractualism

Immanuel Kant did not develop a social contract theory of the state in the Hobbesian or Lockean manner, but he recast contractarian themes in moral terms. His ideas about persons as ends in themselves and laws that all could will as universal form an important bridge to later Kantian contractualism, which treats agreement among free and equal rational agents as a test for moral principles.

Twentieth-Century Revival

In the mid-20th century, John Rawls reanimated contract theory in political philosophy. His A Theory of Justice (1971) introduced the original position and veil of ignorance as devices for deriving principles of justice that free and equal citizens could accept. Rawls’s work shifted contractualism from a story about actual historical consent to a hypothetical, idealized procedure focused on fairness.

Contemporary Moral Contractualism

In the late 20th century, T. M. Scanlon developed moral contractualism in What We Owe to Each Other (1998). Here, the central question is not political authority but interpersonal morality: which principles governing how we treat one another could no one reasonably reject. This formulation inspired extensive work in normative ethics.

Recent Developments

Later contractualists, including Onora O’Neill, Thomas Pogge, and others, have extended contractualist reasoning to global justice, human rights, and structural injustice. At the same time, feminist, critical race, and disability theorists have challenged traditional contract models and developed alternative or revised contractualisms attentive to exclusion, dependence, and power.

3. Etymology of the Name

The term “contractualism” derives from the Latin contractus, meaning “agreement,” “drawing together,” or “being bound together,” combined with the suffix “-ism”, indicating a doctrine or system of belief. In philosophical usage, it designates theories that ground the authority of moral or political principles in some form of agreement, contract, or mutual authorization.

While early modern authors primarily used expressions such as “social contract” or “original compact,” the more abstract label “contractualism” is a later classificatory term, applied retrospectively to unify diverse approaches that share this agreement-centered structure. There is no distinctive pre-modern, non-English original for “contractualism”; cognate terms in other languages (e.g., French contractualisme, German Kontraktualismus) are typically translations introduced in modern scholarly discourse.

The etymology reflects two core ideas:

  1. Contract: Norms are understood as if they result from a binding agreement among persons, whether or not such an agreement actually occurred.
  2. -ism: The focus is not on specific legal contracts but on a general theoretical stance that treats justifiability to would-be contractors as foundational.

In contemporary philosophy, a distinction is sometimes drawn between contractarianism and contractualism. Although usage varies, “contractarianism” is often associated with mutual advantage models rooted in self-interest (e.g., Hobbes, some game-theoretic approaches), while “contractualism” is more commonly reserved for views that emphasize reasonableness, moral equality, and justification to each person (e.g., Rawls, Scanlon). This terminological distinction is not strictly etymological but reflects evolving interpretive conventions in the literature.

4. Core Doctrines and Central Maxims

Contractualism encompasses a variety of views, but many share several core doctrines that structure both moral and political theorizing.

Justifiability to Each Person

A central maxim is that principles must be justifiable to each person subject to them, viewed as a free and equal moral agent. Proponents hold that legitimacy requires that no individual is treated in ways that cannot be defended to them using reasons they could reasonably accept.

Reasonable Acceptance and Rejection

Contemporary contractualists often frame their core test in terms of reasonable acceptance or reasonable rejection:

  • In Scanlonian moral contractualism, an act is wrong if it would be disallowed by any principle that no one could reasonably reject as a basis for informed, unforced general agreement.
  • In Rawlsian political contractualism, principles of justice are those that free and equal persons would choose in a fair bargaining situation (the original position).

These ideas express a shared norm: individuals are owed reasons, not merely outcomes.

Free and Equal Persons

Contractualist doctrines presuppose a normative ideal of free and equal persons. Freedom here typically refers to the capacity to form and revise a conception of the good; equality refers to equal status in justification, not necessarily equal outcomes. Political and moral principles must treat individuals as having independent claims that cannot simply be aggregated away.

Fair Terms of Cooperation

Another maxim is that societies and interpersonal interactions should be governed by fair terms of cooperation. These terms:

  • Distribute benefits and burdens in a way that could be accepted by all;
  • Are publicly knowable and stably regulative;
  • Track considerations such as need, responsibility, and reciprocity, depending on the version of contractualism.

Many contractualists emphasize hypothetical consent: what matters is not actual historical agreement but whether rational, reasonable agents would agree under suitably idealized conditions (e.g., full information, absence of coercion). Some mutual advantage theorists, however, give a larger role to actual bargaining and strategic considerations.

Persons as Objects of Justification

Across variants, a final maxim is that persons are owed justification. Institutions and actions are to be assessed from the standpoint of those affected, with particular attention to the complaints of the worst off or most burdened, rather than solely from an impersonal or aggregative perspective.

5. Metaphysical Views

Contractualism is often characterized by metaphysical modesty. Rather than positing robust, independent moral properties, many contractualists treat moral facts, if any, as grounded in facts about justifiability among persons.

Constructivist Tendencies

A prominent strand interprets contractualism as a form of moral constructivism. On this view:

  • Moral truths are constructed by a specified rational procedure (e.g., Rawls’s original position, Scanlon’s test of reasonable rejection).
  • There is no prior, stance-independent moral order fully determining right and wrong; instead, the outcomes of the justificatory procedure constitute, or at least fix, moral truths.

Proponents argue that this fits with the emphasis on public reason and avoids metaphysical commitments to non-natural moral entities.

Realist and Quasi-Realist Readings

Some interpreters and critics propose more realist interpretations, holding that contractualist procedures merely track independent moral facts about respect, fairness, or human interests. On this reading, contractualism offers an epistemic or justificatory framework rather than an ontological account. Others adopt quasi-realist or expressivist stances, treating contractualist discourse as projecting shared attitudes about reasonable justification onto the world.

Views of Persons

Metaphysically, contractualism presupposes a conception of persons as:

  • Rational and capable of responding to reasons;
  • Reasonable in the sense of being willing to propose and abide by fair terms of cooperation;
  • Possessing a capacity for a sense of justice and a conception of the good (in Rawlsian formulations).

Debates concern how “thick” or “thin” this conception should be, particularly regarding social embeddedness, vulnerability, and dependency.

Naturalism and Supervenience

Many contractualists seek compatibility with philosophical naturalism, holding that moral facts (if posited) supervene on natural and normative facts about human psychology, social interaction, and rational justification. The claim is typically that once all relevant facts about persons, reasons, and possible agreements are fixed, so are the moral facts, without requiring additional metaphysical layers.

Early Modern Backdrop

Early social contract theorists operated within broader metaphysical frameworks—such as mechanistic physics (Hobbes) or natural law (Locke)—but their contract accounts themselves were largely normative and political rather than metaphysically ambitious. Contemporary contractualism inherits this relative metaphysical restraint, concentrating its distinctive claims at the level of justification rather than ontology.

6. Epistemological Views and Methods of Justification

Epistemologically, contractualism emphasizes public reason, deliberation, and idealized justification rather than intuition, revelation, or mere preference aggregation.

Public Reason and Shared Justification

Contractualists generally hold that justified principles must be defensible using reasons accessible to all reasonable persons, not solely sectarian doctrines or private values. This requirement of public justifiability is taken to:

  • Structure how agents should reason about morality and justice;
  • Provide standards for evaluating institutions and social norms.

Hypothetical Choice Procedures

Central to contractualist epistemology are hypothetical choice or agreement procedures. Examples include:

  • Rawls’s original position, in which rational representatives, ignorant of their clients’ particular traits, select principles of justice;
  • Scanlon’s test, which asks which principles no one could reasonably reject, given full information and mutual recognition.

These devices function as models of reasoning rather than predictions of actual agreement. Proponents argue that reflecting on such situations can help us identify principles that we have the strongest reason to endorse.

Idealization and Reasonableness

Contractualist justification typically involves some degree of idealization:

  • Agents are informed, competent, and not subject to coercion;
  • They reason fairly and are willing to abide by fair terms of cooperation.

Debates focus on how much idealization is appropriate. Critics argue that excessive idealization may detach principles from real-world conditions, while defenders maintain that some idealization is necessary to filter out prejudice, ignorance, and power asymmetries.

Fallibilism and Reflective Equilibrium

Many contractualists adopt a fallibilist stance: moral and political principles are revisable in light of better arguments or new information about what persons could reasonably accept. Methods such as reflective equilibrium—mutual adjustment between considered judgments and principles—are often combined with contractualist procedures to reach more stable, coherent views.

Role of Empirical Knowledge

Although contractualism uses largely normative tools, empirical information about human psychology, social structures, and institutional effects is typically regarded as relevant to assessing which principles are reasonably acceptable. The epistemic task involves integrating such information into the justificatory procedure without letting contingent power relations determine what counts as “reasonable.”

7. Ethical System: What We Owe to Each Other

In its ethical form, contractualism is often identified with T. M. Scanlon’s account of “what we owe to each other”—a phrase that has become shorthand for the broader moral domain the theory seeks to capture.

The Basic Idea

Scanlonian contractualism holds that:

An act is wrong if and only if it would be disallowed by any system of principles for the general regulation of behavior that no one could reasonably reject as a basis for informed, unforced general agreement.

On this view, moral rightness is determined not by maximizing impersonal value but by respecting principles that others, as free and equal persons, could not reasonably object to.

Interpersonal Focus

The ethical focus is relational. The central category is not overall goodness but wronging someone—treating them in a way that cannot be justified to them. Duties arise from the need to stand in relations of mutual recognition and respect:

  • Duties of non-harm, fidelity, and honesty;
  • Duties of aid, rescue, and assistance under certain conditions;
  • Duties of fairness in cooperation and distribution of burdens.

The aim is to identify principles governing these domains that would be acceptable to all affected parties.

Reasonable Rejection

A key notion is reasonable rejection. Different individuals may have competing complaints about a principle (e.g., burdens, risks, restrictions). Contractualism requires comparing the strength and nature of these complaints. A principle is unreasonable if some persons have especially strong objections that cannot be outweighed simply by aggregating lesser benefits to others. This tends to give special weight to the standpoint of those who would be worst off under a principle.

Scope and Limits

Scanlon distinguishes the domain of “what we owe to each other” from other values, such as personal projects, friendship, or the good of non-persons. Contractualist morality, on his account, primarily concerns duties owed between persons as co-members of a moral community. Other theorists debate how far contractualist reasoning can or should extend, for example to animals, future generations, or impersonal values.

Deontological Structure

Many commentators interpret Scanlonian ethics as broadly deontological: it yields constraints on treating individuals merely as means, supports strong rights, and resists sacrificing some for the sake of aggregate benefits. However, contractualists also emphasize that outcomes matter insofar as they affect the justifiability of principles to individuals, integrating consequentialist considerations within a justificatory framework centered on persons.

8. Political Philosophy and the Social Contract

In political philosophy, contractualism appears most prominently as social contract theory, which explains and justifies political authority through ideas of agreement among citizens.

Justification of Political Authority

Social contract theorists hold that a state or political order is legitimate only if it could be the object of a free and fair agreement among those subject to it. This agreement may be:

  • Historical or actual (as in some interpretations of Locke), or
  • Hypothetical and idealized (as in Rawls’s original position).

The core claim is that political institutions must be arranged so that citizens could reasonably accept their basic terms.

The Basic Structure of Society

Modern contractualists, especially Rawls, focus on the basic structure of society—its main political, economic, and social institutions. Principles of justice are assessed as standards for this structure, not for every particular act. According to Rawls, citizens regarded as free and equal would choose principles ensuring:

  • Equal basic liberties;
  • Fair equality of opportunity;
  • Regulated social and economic inequalities.

These choices are made under conditions designed to model impartiality and mutual respect.

Contractualist political theories seek to explain:

  • Political obligation: why individuals have reasons to obey the law and support institutions;
  • Legitimacy: when the exercise of political power is morally permissible.

Some views tie obligation closely to actual consent or participation, while others treat the relevant “consent” as hypothetical but normatively significant—what citizens could not reasonably reject, given their status as free and equal.

Rights, Constitutionalism, and Public Reason

Contractualist approaches typically support:

  • Strong constitutional protections of basic rights and liberties;
  • Requirements that laws and policies be justifiable in terms of public reason—arguments that all citizens can reasonably accept;
  • Democratic procedures as embodiments of citizens’ equal status in collective decision-making.

Debates within contractualism concern how demanding these standards of public justification should be and how they apply in pluralistic societies with deep moral and religious diversity.

9. Key Figures and Canonical Texts

The contractualist tradition involves a range of thinkers who employ contract-based reasoning in distinct ways.

Early Modern Social Contract Theorists

FigureRole in ContractualismCanonical Texts
Thomas HobbesFoundational contractarian; security-focused state justificationLeviathan (1651)
John LockeRights-based, limited government via consentTwo Treatises of Government (1689)
Jean-Jacques RousseauRepublican and democratic reinterpretation of the social contractDu contrat social (1762)

These authors primarily address political legitimacy and obligation rather than contract-based morality as such.

Kant and Proto-Contractualism

Immanuel Kant is often seen as providing a moral foundation for later contractualism, despite not offering a standard social contract theory. Relevant works include:

His ideas about persons as ends in themselves and universal laws inform Kantian contractualist approaches.

Twentieth-Century Political Contractualism

John Rawls is a central figure in contemporary contractualism. His key texts are:

  • A Theory of Justice (1971, rev. 1999), introducing the original position and veil of ignorance;
  • Political Liberalism (1993), developing a public reason framework for pluralistic societies;
  • The Law of Peoples (1999), extending contractualism to international relations.

Rawls’s work has become a standard reference point in debates about justice and legitimacy.

Moral Contractualism

T. M. Scanlon is the leading proponent of moral contractualism:

  • “Contractualism and Utilitarianism (1982) articulates early contrasts with consequentialism;
  • What We Owe to Each Other (1998) presents the mature account of reasonable rejection and interpersonal morality.

Contemporary Contributors

Other significant figures include:

  • Onora O’Neill, who develops a Kantian, agency-focused contractualism, especially in Constructions of Reason (1990);
  • Thomas Pogge, who employs Rawlsian ideas in global justice, notably in World Poverty and Human Rights (2002);
  • Various feminist and critical theorists (e.g., Carole Pateman, Charles Mills) who critique and reconstruct social contract traditions to address gendered and racialized exclusions.

These authors have broadened both the scope and the critical assessment of contractualist theories.

10. Variants: Mutual Advantage and Kantian Contractualism

Within the broader contract-based family, two influential variants are mutual advantage contractualism and Kantian contractualism. They differ in how they model agents, reasons, and agreement.

Mutual Advantage Contractualism

Mutual advantage approaches, often labeled contractarian, understand the contract as a bargain among self-interested agents.

  • Agents are assumed to seek their own good, with limited concern for others.
  • Agreements are justified when they leave each participant better off relative to some baseline (such as a Hobbesian state of nature).
  • Stability and compliance are explained by the fact that adhering to the agreement is in each party’s interest, given others’ compliance.

Contemporary versions draw on game theory and rational choice theory to model cooperation under conditions of potential conflict. Proponents argue that such models provide a realistic account of how norms and institutions can emerge and be maintained among strategically rational agents.

Critics contend that mutual advantage theories have difficulty grounding duties to those who cannot contribute to mutual benefit (e.g., severely disabled persons, non-human animals) or explaining robust egalitarian obligations.

Kantian Contractualism

Kantian contractualism, by contrast, depicts agents as reasonable as well as rational, and as possessing equal moral status. It emphasizes:

  • Respect for persons as ends in themselves;
  • Principles that all can will or endorse as free and equal;
  • Justification in terms of reasons that others can reasonably accept, rather than mere advantage.

Rawls’s and Scanlon’s theories are paradigmatic examples, though they employ different procedural models (original position vs. reasonable rejection). On these views, agreement is constrained by moral requirements of fairness and respect, not just by bargaining power.

This variant is often associated with egalitarian and rights-based conclusions, since unfair advantages or exploitation cannot be justified to all parties as equals. Disputes within Kantian contractualism concern the appropriate characterization of reasonableness, the weight of individual rights versus collective goods, and the extent to which consequentialist considerations can be incorporated.

11. Comparison with Utilitarianism and Other Rivals

Contractualism is frequently contrasted with utilitarianism and other moral and political theories. These comparisons highlight differences in moral focus, justification, and treatment of individuals.

Contractualism vs. Utilitarianism

FeatureContractualismUtilitarianism
Fundamental standardJustifiability to each person; reasonable acceptance/rejectionMaximization of overall welfare or utility
Moral focusWhat we owe to each other; fairness; rightsImpersonal value of outcomes
Treatment of personsIndividuals as separate, with non-aggregable claims (on many views)Individuals’ interests aggregated into a single sum
MethodHypothetical agreement, public justificationCost–benefit analysis, utility calculation

Proponents of contractualism argue that it better captures the intuition that some actions (e.g., punishing an innocent person) are wrong even if they maximize overall welfare. Utilitarians respond that contractualist procedures are themselves justified by their consequences or that utilitarianism can accommodate rights and fairness as rules that promote welfare.

Other Rivals

  1. Libertarianism
    Libertarian theories prioritize strong rights to self-ownership and property, typically endorsing a minimal state. Contractualists often argue for more extensive duties of distributive justice and social support, justified by what all citizens can accept. Libertarians may object that contractualist principles license unjustified interference with individual liberty.

  2. Communitarianism
    Communitarian thinkers ground norms in shared traditions, values, and communal identities. Contractualism instead relies on principles acceptable to individuals abstracted from particular social roles. Critics claim this abstraction neglects the constitutive role of communities, while contractualists reply that some distance from particular traditions is necessary to ensure fairness and equal respect.

  3. Ethical Egoism
    Ethical egoism makes self-interest the only fundamental moral requirement. Mutual advantage contractualism has some affinity with egoistic assumptions but still justifies constraints on individual behavior through benefits of cooperation. Kantian contractualists typically reject egoism as incompatible with equal respect and public justification.

  4. Robust Moral Realism
    Robust realists posit stance-independent moral facts that exist independently of human agreements. Contractualists often present their view as a form of constructivism or proceduralism, where moral truths are determined by justified agreement. Realists criticize this as collapsing moral truth into social or rational consensus, while contractualists argue their procedures provide substantive, not merely conventional, standards.

These comparisons frame ongoing debates about whether agreement-based justifications can fully account for moral obligation and political legitimacy, or whether alternative foundations are required.

12. Methodological Tools: Original Position and Veil of Ignorance

Among contractualism’s most influential methodological devices are John Rawls’s original position and veil of ignorance, designed to model fair agreement on principles of justice.

The Original Position

The original position is a hypothetical choice situation in which:

  • Parties represent citizens of a society;
  • They are rational and mutually disinterested, seeking to secure the best achievable position for those they represent;
  • They choose principles to govern the basic structure of society.

The setup is intended to capture conditions of fair bargaining among free and equal persons. The outcome—principles chosen in this situation—is taken to represent what citizens could reasonably accept as terms of social cooperation.

The Veil of Ignorance

A defining feature of the original position is the veil of ignorance. Behind this veil, parties lack knowledge of:

  • Their social class, race, gender, or ethnicity;
  • Their natural talents and disabilities;
  • Their particular conception of the good life;
  • Their generation or social position.

They do, however, know general facts about human psychology, economics, and social cooperation, as well as that they will live under the chosen principles.

The veil is meant to eliminate morally irrelevant information that could bias the choice of principles in favor of particular groups, thereby modeling impartiality and equality.

Justificatory Role

Proponents hold that principles chosen under these conditions are justified because:

  • No one is advantaged by morally arbitrary facts;
  • The procedure embodies fairness and respect for persons as free and equal;
  • Citizens can see the resulting principles as ones they could have endorsed.

The original position thus functions as a test for principles, not as a prediction of actual historical consent.

Influence and Critiques

The original position and veil of ignorance have been widely discussed, adapted, and criticized:

  • Some accept the devices but propose different informational constraints or decision rules.
  • Others argue that the setup smuggles in substantive values (such as risk aversion or egalitarianism) or that it is too idealized to guide real-world politics.
  • Alternative contractualist methods, such as Scanlon’s reasonable rejection test, are partly motivated by such concerns, though they share the aim of modeling fair justification.

Despite debates, these tools remain central reference points for contractualist methodology and for broader discussions about fairness and impartial reasoning in political philosophy.

13. Applications to Rights, Equality, and Global Justice

Contractualist frameworks have been applied extensively to questions of rights, equality, and global justice, particularly in Rawlsian and post-Rawlsian political philosophy.

Rights and Basic Liberties

Contractualists typically argue that certain basic rights must be guaranteed because no free and equal person could reasonably accept principles that allow their systematic violation. This includes:

  • Civil and political rights such as freedom of speech, conscience, and association;
  • Rights to bodily integrity and due process.

The justification proceeds by asking whether individuals, under fair conditions of choice, would agree to principles that leave such rights insecure. Many contractualists contend that the answer is negative, grounding robust constitutional protections.

Equality and Distributive Justice

On questions of equality, contractualists often focus on fair terms of cooperation rather than strict equality of outcome. Rawls’s principles, for example, support:

  • Equal basic liberties for all;
  • Fair equality of opportunity;
  • The difference principle, permitting inequalities only if they benefit the least advantaged.

Proponents argue that citizens behind a veil of ignorance would endorse arrangements that protect them against being among the worst off. Critics debate whether contractualist reasoning supports stronger egalitarianism, sufficientarianism (focus on thresholds), or alternative distributive standards.

Global Justice and Human Rights

Contractualist ideas have been extended beyond the nation-state to global justice:

  • Rawls’s The Law of Peoples uses an international analogue of the original position to derive principles regulating relations among “peoples,” including basic human rights and limits on economic inequality between societies.
  • Other thinkers, such as Thomas Pogge, argue for more demanding global principles, claiming that contractualist reasoning condemns existing global economic structures that foreseeably contribute to poverty and deprivation.

Discussions center on whether the relevant contractors should be states, peoples, or individuals, and how to model fairness in a highly unequal global order.

Inclusion, Vulnerability, and Structural Injustice

Recent contractualist work addresses structural injustice, gender and racial inequalities, and the status of marginalized or vulnerable groups. Some theorists argue that any contractualist model must ensure that:

  • Those subject to systematic disadvantage are fully represented in the justificatory procedure;
  • Dependence, care, and vulnerability are taken seriously, not bracketed as private matters.

Contractualist approaches have been used both to critique existing social contracts as exclusionary and to propose more inclusive, egalitarian frameworks for rights and justice at domestic and global levels.

14. Criticisms and Contemporary Debates

Contractualism has prompted extensive critical discussion, both from external perspectives and from within the tradition.

Scope and Exclusion

Critics question whether contract-based models can adequately account for duties to:

  • Children and persons with severe cognitive disabilities;
  • Non-human animals;
  • Future generations.

Since these parties cannot participate as contractors, some argue that contractualism either excludes them or must rely on indirect protections (e.g., via the concern of current contractors), which may seem insufficient. Contractualists respond by revising the characterization of contractors, appealing to representative devices, or expanding the domain of justifiability.

Idealization and Realism

Another major debate concerns the degree of idealization in contractualist procedures. Objections include:

  • The original position and similar devices assume conditions (e.g., full information, absence of coercion) far removed from real political life;
  • They may obscure or normalize existing power imbalances, especially along lines of class, gender, and race.

Defenders argue that idealization is necessary to filter out bias and domination, while critics press for “non-ideal” or “realist” contractualisms that take persistent injustice more directly into account.

Aggregation and Numbers

In moral contractualism, a central controversy revolves around how to treat numbers and aggregation. Some interpretations of Scanlon suggest that contractualism cannot straightforwardly aggregate many small benefits to outweigh a grave burden on one person, leading to puzzles in cases where saving many seems morally urgent. Debates explore whether and how contractualists can justify giving weight to the number of people affected while preserving the separateness of persons.

Motivational and Explanatory Power

Skeptics question whether hypothetical agreements can genuinely explain moral obligation or political legitimacy. They argue that:

  • Agreement-based stories may be purely heuristic and lack independent normative force;
  • Actual moral motivation often depends on emotions, virtues, or social identities that are not captured by abstract contractual reasoning.

Contractualists typically interpret their procedures as articulating the structure of justifiability implicit in ordinary moral practice, but the adequacy of this interpretation remains contested.

Feminist and Critical Race Critiques

Feminist and critical race theorists have argued that traditional social contract narratives often:

  • Presuppose an idealized, independent contractor, downplaying care, dependency, and social subordination;
  • Obscure historical injustices such as patriarchy, colonialism, and racial hierarchy.

Some propose abandoning contract frameworks, while others develop critical or reconstructive contractualisms that explicitly address these issues and revise the characterization of contractors and the background conditions of agreement.

These debates continue to shape the evolution of contractualist theories and their role in contemporary moral and political philosophy.

15. Legacy and Historical Significance

Contractualism has had a substantial and continuing impact on both moral and political thought.

Influence on Political Institutions and Ideals

Social contract ideas have contributed to the development of:

  • Modern conceptions of popular sovereignty and legitimate authority, influencing constitutional design in various liberal democracies;
  • Norms of consent, representation, and rule of law, seen as institutional expressions of citizens’ status as co-authors of political order.

Even where not explicitly invoked, contractualist themes underpin many contemporary assumptions about the justifiability of state power and the necessity of rights protections.

Centrality in Analytic Political Philosophy

In the late 20th and early 21st centuries, Rawlsian contractualism became a central reference point in Anglophone political philosophy, shaping discussions of:

  • Distributive justice and egalitarianism;
  • Liberal neutrality and political legitimacy in pluralistic societies;
  • Public reason and the role of moral disagreement in democracy.

Many rival theories (e.g., luck egalitarianism, prioritarianism, capabilities approaches) have been developed partly in dialogue with or in response to Rawlsian contractualism.

Contributions to Moral Theory

Scanlonian moral contractualism has influenced debates on:

  • The nature of moral wrongness and the structure of moral reasons;
  • Interpersonal justification, recognition, and respect;
  • The relationship between deontological constraints and consequentialist considerations.

Contractualist ideas about what we owe to each other have permeated discussions in applied ethics, including bioethics, business ethics, and the ethics of risk.

Critical Reassessment and Transformation

Feminist, critical race, and postcolonial critiques have prompted reassessment of social contract traditions, highlighting historical exclusions and asymmetries of power. This has led to:

  • Alternative narratives (e.g., “sexual contract,” “racial contract”) that reinterpret contract imagery as revealing rather than resolving injustice;
  • Efforts to construct more inclusive, globally oriented contractualisms responsive to structural inequality and vulnerability.

Ongoing Research Program

Contractualism remains an active research program rather than a closed doctrine. Contemporary work explores:

  • Non-ideal and global applications;
  • The integration of empirical social science into contractualist justification;
  • Hybrid theories combining contractualist procedures with other normative foundations.

Through these developments, contractualism continues to shape how philosophers, legal theorists, and political theorists conceptualize justification, fairness, and the relations among free and equal persons.

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APA Style (7th Edition)

Philopedia. (2025). contractualism. Philopedia. https://philopedia.com/schools/contractualism/

MLA Style (9th Edition)

"contractualism." Philopedia, 2025, https://philopedia.com/schools/contractualism/.

Chicago Style (17th Edition)

Philopedia. "contractualism." Philopedia. Accessed December 10, 2025. https://philopedia.com/schools/contractualism/.

BibTeX
@online{philopedia_contractualism,
  title = {contractualism},
  author = {Philopedia},
  year = {2025},
  url = {https://philopedia.com/schools/contractualism/},
  urldate = {December 10, 2025}
}

Study Guide

Key Concepts

Contractualism

A family of moral and political theories holding that the validity of principles depends on whether they could be reasonably accepted or agreed to by free and equal persons.

Social Contract

A usually hypothetical agreement among individuals to form a society or political authority under shared rules, used to justify political obligations and legitimacy.

Free and Equal Persons

The normative ideal of agents in contractualism, treated as having the capacity for a sense of justice and a conception of the good, and entitled to equal respect in justification.

Reasonable Rejection

In Scanlonian contractualism, the standard according to which a principle is unacceptable if any person affected by it has strong enough reasons to reject it that others must acknowledge as reasonable.

Original Position and Veil of Ignorance

Rawls’s thought experiment (original position) in which parties, ignorant of their particular identities behind a veil of ignorance, choose principles of justice for the basic structure of society.

Public Justification

The requirement that principles and institutions be justifiable to all citizens using reasons that others can reasonably accept, not merely sectarian or self-interested grounds.

Mutual Advantage vs. Kantian Contractualism

Mutual advantage contractualism models agreement among self-interested agents seeking benefits, whereas Kantian contractualism models agreement among reasonable agents committed to fairness and respect for persons as equals.

What We Owe to Each Other

Scanlon’s phrase for the domain of morality governed by principles that no one could reasonably reject as a basis for the general regulation of behavior among persons.

Discussion Questions
Q1

How does contractualism’s standard of “justifiability to each person” differ from utilitarianism’s standard of maximizing total or average welfare, and what practical moral disagreements might this lead to?

Q2

In what ways do Rawls’s original position and Scanlon’s test of reasonable rejection embody similar contractualist ideas, and where do they differ in their aims and structure?

Q3

Can contractualism adequately account for moral duties to those who cannot participate as contractors—such as non-human animals, young children, or future generations—or does it need to be supplemented or revised?

Q4

Is the level of idealization in contractualist models (e.g., full information, absence of coercion, veil of ignorance) justified, or does it risk masking real-world power structures and injustices?

Q5

How do mutual advantage and Kantian versions of contractualism differ in the kinds of political and distributive principles they are likely to endorse (e.g., minimal state vs. egalitarian state)?

Q6

To what extent should contractualist political theories, such as Rawls’s, be seen as constructivist accounts of what justice is, versus epistemic devices for discovering mind-independent moral truths?

Q7

Does the contractualist focus on “what we owe to each other” leave out important moral values that are not primarily about interpersonal justification, such as ideals of personal excellence, attachments to non-persons, or environmental concerns?