Social contract theory attempted to ground legitimate political authority in the rational consent of the governed rather than in divine right, tradition, or force. Hobbes (Leviathan, 1651) argued that without strong government, human life would be 'solitary, poor, nasty, brutish, and short,' so rational individuals consent to an absolute sovereign for security. Locke (Second Treatise, 1689) countered that individuals possess natural rights to life, liberty, and property, and that government exists to protect these rights — if it fails, citizens may revolt. Rousseau (Social Contract, 1762) introduced the concept of the general will and argued for popular sovereignty as the only legitimate basis of law. These theories directly shaped the American Declaration of Independence and the French Declaration of the Rights of Man and Citizen.
Compare Hobbes, Locke, and Rousseau systematically on three questions: the state of nature, the basis of the social contract, and the right of resistance. Identify specific passages in the Declaration of Independence that echo Lockean language.
The philosophers of the Enlightenment were responding to a crisis in political legitimacy. Medieval Europe had grounded royal authority in divine right: kings ruled because God ordained it, and the Church certified that ordination. But the English Civil War showed that this foundation could crack — a king could be tried, convicted, and executed by his own subjects. After 1649, thoughtful people had to answer a hard question: if not God, what makes political authority legitimate?
Social contract theory was the answer that stuck. Thomas Hobbes wrote *Leviathan* in 1651, during the chaos of the Civil War's aftermath. His state of nature — the condition without government — is a thought experiment, not a historical description: a logical reconstruction of what human life would be like if authority dissolved. His answer was bleak: self-interested individuals in perpetual conflict, life "nasty, brutish, and short." Rational individuals would therefore consent to transfer their freedom to an absolute sovereign who could enforce peace. Notice the move: authority flows *up* from individual consent, not *down* from God. Even Hobbes's absolutism was grounded in rational self-interest, not divine mandate.
John Locke took the same framework to opposite conclusions. Writing after the Glorious Revolution of 1688 — the settlement that made Parliament supreme — Locke argued that the natural rights to life, liberty, and property existed *before* government, not as gifts from the state but as moral entitlements. Government was therefore not the origin of rights but their *trustee*: a mechanism individuals created to protect what they already possessed. If government violated those rights, the trust was broken, and the right of revolution followed logically. You can see Locke's language nearly verbatim in the Declaration of Independence: "life, liberty, and the pursuit of happiness" is a paraphrase of Locke's triad, with "happiness" substituted for "property."
Rousseau added the most radical element. For Hobbes and Locke, the social contract was essentially a bargain among individuals. Rousseau introduced the general will — the idea that a properly constituted political community expresses a collective interest that is more than the sum of individual preferences. Legitimate law was not majority vote (which could express collective selfishness) but the general will (what the community would want if it reasoned correctly about its common good). This distinction — between democracy as popular preference and democracy as rational collective self-governance — would echo through the French Revolution, and through every subsequent debate about whether democratic majorities can be tyrannical. These three thinkers were not simply agreeing with each other: they created a framework for modern political debate that we still inhabit.
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