Social Contract Theory: Hobbes, Locke, Rousseau, Rawls

The Thought Experiment That Built Modern Government

Social contract theory asks a foundational question: why should any person obey the state? What gives governments legitimate authority over individuals who never consented to be governed? The answer developed across three centuries and four major thinkers — Hobbes, Locke, Rousseau, and Rawls — by imagining a "state of nature" that predates political society, then asking what rational individuals would agree to in order to escape it. The conclusions diverged dramatically, generating not one theory but a family of theories with incompatible implications for the proper scope of governmental power. Nearly every major debate in liberal democratic theory — about rights, redistribution, civil disobedience, and political obligation — is implicitly a debate within or against this tradition.

The State of Nature Concept

The state of nature is not a claim about prehistoric history (though Rousseau sometimes writes as if it were). It is a philosophical device: what would human beings be like, and how would they relate to one another, in the absence of political authority? Different answers to this question produce radically different political theories.

Hobbes: The Leviathan

Thomas Hobbes (1588–1679) wrote Leviathan (1651) in the shadow of the English Civil War, and his state of nature reflects it. Without political authority, Hobbes argues, human life is a war of "every man against every man" — not necessarily constant warfare, but a condition of permanent insecurity in which violent conflict is always possible and trust is impossible. His famous phrase: life in the state of nature is "solitary, poor, nasty, brutish, and short."

The reason is human equality. Unlike animals with clear dominators, humans are roughly equal in strength and cunning — equal enough that any person can kill any other with sufficient preparation. This rough equality produces competition, diffidence (preemptive attack out of fear), and glory-seeking. There is no injustice in the state of nature, because justice and injustice are concepts that require law, and law requires a sovereign to enforce it.

• Hobbes's contract establishes an absolute sovereign — not a party to the contract, but its product — who cannot be rightfully resisted as long as they protect citizens
• The only inalienable right is self-preservation: a subject can always resist if the sovereign threatens their life, because they contracted to escape death, not to embrace it at the sovereign's discretion
• Hobbes explicitly allows for republican and monarchical governments; he preferred monarchy as less prone to factional conflict
• His materialism and determinism were scandalous to contemporaries; Leviathan was banned by Oxford University in 1683

Locke: Natural Rights and Limited Government

John Locke (1632–1704) accepts a state of nature but describes it very differently. In Two Treatises of Government (1689), Locke's state of nature is a state of liberty and equality, governed by the law of nature (accessible to reason) that prohibits violating others' life, liberty, or property. People in the state of nature have natural rights — they are not created by government but precede it.

The problem with the state of nature is not universal warfare but the lack of an impartial judge to resolve disputes. Everyone is judge in their own case, which creates bias and escalating conflicts. Individuals consent to join civil society and establish government to gain an impartial arbiter — but the government's authority is limited to protecting the natural rights they already had. If the government violates those rights (particularly property rights), it dissolves the contract, and the people may resist and replace it.

Locke's Influence on American Founding

Jefferson's Declaration of Independence (1776) is nearly a paraphrase of Locke: the claims about self-evident truths, inalienable rights, and the right to alter or abolish government that fails to protect those rights are drawn directly from Locke's second treatise. Locke's concept of tacit consent — that those who use the roads, live on the land, and benefit from the state's protection implicitly consent to its authority — was designed to explain political obligation in the absence of an actual historical contract, but has been extensively criticized as circular.

Rousseau: The General Will

Jean-Jacques Rousseau (1712–1778) offered the most radical reimagining of the social contract in The Social Contract (1762). His state of nature is not fearful or conflictual — it is innocent and peaceful. Humans become corrupted through the development of civilization, private property, and the comparison of oneself to others (amour-propre). The social contract is not a solution to pre-social conflicts but a mechanism by which genuine freedom — moral self-governance — becomes possible.

Rousseau's concept of the general will (volonté générale) is his most influential and contested contribution. The general will is not the sum of individual preferences (the "will of all") but what the community genuinely wills for the common good when thinking as citizens rather than as self-interested individuals. Obeying the general will is genuine freedom — not constraint. This sounds paradoxical; Rousseau acknowledges it with his troubling phrase that individuals may be "forced to be free."

Rawls: The Veil of Ignorance

John Rawls (1921–2002) revived social contract theory in A Theory of Justice (1971), the most important work of political philosophy in the 20th century. Rawls replaced the state of nature with the "original position" — a hypothetical situation in which rational individuals choose principles of justice without knowing their place in society, their class position, fortune, natural abilities, intelligence, or conception of the good. This "veil of ignorance" ensures that the chosen principles are fair, because no one can design the system to favor their own position.

• Behind the veil, Rawls argues, rational individuals would choose two principles: (1) each person should have the most extensive system of equal basic liberties compatible with the same for all; (2) social and economic inequalities must be attached to positions open to all under fair equality of opportunity, and must benefit the least advantaged members of society (the difference principle)
• The difference principle is a sophisticated departure from strict equality: inequality is justified only if it makes the worst-off members of society better off than they would be under equality
• Rawls's framework supports a redistributive welfare state — significant inequalities are permissible, but only if they improve outcomes for the least advantaged
• His later work Political Liberalism (1993) revised the theory to acknowledge that citizens hold incompatible "comprehensive doctrines" (religious, philosophical, moral worldviews) and that political principles must be justified in "public reason" — terms any reasonable citizen can accept regardless of their deeper worldview

Social contract theory remains the dominant framework for thinking about political legitimacy in liberal democratic societies. Its core question — what could rational individuals agree to — continues to generate answers across the spectrum from libertarianism (Nozick's Anarchy, State, and Utopia, 1974) to egalitarianism (Rawls), communitarianism (Sandel, MacIntyre), and feminist critiques (Pateman's The Sexual Contract, 1988).