The social contract tradition represents one of the most influential frameworks in Western political philosophy, seeking to ground political authority not in divine right or natural hierarchy but in the consent of individuals. Thomas Hobbes, John Locke, and Jean-Jacques Rousseau stand as the three seminal figures in this tradition, each offering radically different conceptions of human nature, the state of nature, the nature of the contract, and the legitimate form of government that emerges from it. This analysis compares their theories across these fundamental dimensions, drawing on their principal works: Hobbes’s “Leviathan” (1651), Locke’s “Second Treatise of Government” (1690), and Rousseau’s “Du contrat social” (1762).
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The State of Nature
The state of nature is the hypothetical condition of humanity without government, and each thinker constructs it to serve different philosophical purposes. For Hobbes, the state of nature is a condition of perpetual war. He posits three principal causes of conflict: competition, which leads men to invade for gain; diffidence (distrust), which leads them to invade for safety; and glory, which leads them to invade for reputation. Because even the weakest can kill the strongest through stealth or alliance, no one can feel secure. In this condition, every individual possesses the “Right of Nature”, the liberty to use their own power for self-preservation. Hobbes famously concludes that in the state of nature, life is “solitary, poor, nasty, brutish, and short.” Crucially, this state is not merely a possibility but the logical consequence of human passions operating without a common power to keep all in awe.
Locke’s state of nature differs dramatically. It is “a state of peace, goodwill, mutual assistance and preservation,” governed by the law of nature discoverable by reason. This law teaches that “being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.” However, the Lockean state of nature has three significant inconveniences: there is no established, settled, known law; there is no known and impartial judge to apply that law; and there is no executive power to enforce just judgments. These inconveniences, rather than the fear of violent death, motivate individuals to enter civil society.
Rousseau’s state of nature is neither Hobbesian war nor Lockean peace but a condition of solitary, amoral innocence. In this original state, human beings are driven by two fundamental principles: self-preservation and pity. There is no morality, no justice, and no injustice, merely the innocent exercise of natural impulses. However, as humanity develops, as population increases, and as social relations emerge, this natural freedom becomes untenable. The emergence of property, the division of labour, and the rise of comparative vanity (amour-propre) create conflicts that the state of nature cannot resolve. Unlike Hobbes and Locke, Rousseau does not present the state of nature as something to be escaped but as a condition from which humanity has tragically departed.
The Nature of the Social Contract
Each thinker proposes a fundamentally different contract. Hobbes’s contract is an agreement among individuals to transfer their rights to an absolute sovereign. Each person says to every other: “I transfer my right of governing myself to the sovereign if you do too.” Crucially, the sovereign is not a party to the contract but receives obedience as a free gift in hope of protection. The contract creates the Commonwealth, transforming a multitude into “one Person” through representation. This is total alienation: individuals surrender all their rights except the inalienable right to life.
Locke’s contract is twofold. First, individuals agree to form a political community, surrendering only their personal power to enforce the law of nature. They retain their natural rights to life, liberty, and property. Second, this community establishes government as a trust, with powers carefully separated and constrained. The contract is conditional: government exists to protect rights, and its authority is limited by that purpose.
Rousseau’s contract is the most radical. It involves “the total alienation of each associate, together with all his rights, to the whole community.” Only by giving everything to everyone does each individual gain an equivalent stake in the whole. This creates a new entity, the “corps politique” or political body, whose collective will is sovereign. Unlike Hobbes, Rousseau insists sovereignty cannot be alienated to a ruler; unlike Locke, he insists natural rights are not retained against the community but transformed into civil rights through participation in the general will.
Sovereignty and Government
The three thinkers diverge fundamentally on the nature and location of sovereign authority. For Hobbes, sovereignty is absolute and undivided. The sovereign determines property rights, regulates the economy, defines crimes and punishments, commands the army, and interprets law and scripture. The sovereign is not bound by civil law and cannot be accused of injustice toward subjects, because subjects have authorized all sovereign actions. However, Hobbes recognizes one limit: the right to life is inalienable, so subjects may resist when the sovereign directly threatens their survival. The sovereign who makes subjects feel insecure loses their obligation to obey.
For Locke, sovereignty is limited and divided. He advocates separation of powers, distinguishing legislative and executive branches. The legislative power is supreme but not absolute: it must govern by established laws designed for public good, cannot raise taxes without consent, and cannot transfer its law-making authority. Government is a trust, and when it violates this trust, the people retain the ultimate authority to judge and replace it. This defense of revolution directly influenced the American Declaration of Independence.
For Rousseau, sovereignty resides inalienably in the people as a whole. The general will is not merely the sum of individual interests but the common interest citizens share as citizens. Government, whether democratic, aristocratic, or monarchical, is merely the executive power that applies laws to particular cases. It is not a party to the contract but an institution established by the sovereign people. When government usurps sovereign authority, the people have the right to dissolve it.
Human Nature and Political Transformation
Underlying these differences are competing conceptions of human nature. Hobbes rejects the Aristotelian view that humans are naturally political. Instead, they are driven by passions that magnify self-interest, easily swayed by rhetoric, and prone to competition and denigration of others. Political order is artificial, restraining destructive passions through fear of punishment.
Locke offers a more optimistic view. Humans are rational creatures capable of recognizing natural law and cooperating for mutual benefit. The inconveniences of the state of nature, not its horrors, motivate political association.
Rousseau’s view is the most complex. Natural humans are neither good nor evil but amoral. The problem is that society corrupts, creating inequality and vanity. Yet society also makes possible the highest human achievement: moral freedom. By participating in the general will, citizens achieve “obedience to a law one prescribes to oneself”, a form of autonomy impossible in the state of nature. The task of politics is to transform natural individuals into citizens through institutions that cultivate virtue.
The Purpose of Government
For Hobbes, the purpose of government is security. The Commonwealth exists to prevent the war of all against all and to create conditions under which industry, commerce, and culture become possible. Peace is not an end in itself but the precondition for human flourishing.
For Locke, the purpose of government is the protection of property, understood broadly as “life, liberty, and estate.” Government provides the established laws, impartial judges, and effective enforcement mechanisms missing in the state of nature, allowing individuals to peacefully enjoy the fruits of their labor.
For Rousseau, the purpose of government is moral freedom. The social contract transforms natural liberty into civil liberty and, most importantly, into moral liberty, the capacity to act according to laws one gives oneself. True freedom is not the absence of constraint but obedience to a law one prescribes to oneself.
The Right to Resistance
Each theorist’s account of resistance follows logically from their premises. Hobbes’s account is the most limited. Because the sovereign is not party to the contract, subjects cannot claim breach of contract. However, the right to life is inalienable, so individuals may resist direct threats to their lives. This is a right of individual self-defence, not collective revolution.
Locke’s account is the most developed. When government violates its trust, by attempting to destroy or take away property, by reducing people to slavery under arbitrary power, or by repeatedly violating rights, the people have the right to “appeal to heaven” and resist. This is a collective right to overthrow and replace tyrannical government.
Rousseau’s account follows from popular sovereignty. Because sovereignty always resides in the people, and government is merely a commission, the people retain ultimate authority to judge whether that commission has been faithfully executed. When government usurps sovereign authority, the people not only may but must resist.
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The social contract theories of Hobbes, Locke, and Rousseau represent three distinct answers to the fundamental question of political philosophy: what makes government legitimate? Hobbes answers that legitimacy arises from the effective provision of security, which rational individuals prefer to the horrors of the state of nature. Locke answers that legitimacy arises from consent and the protection of natural rights, with government as a revocable trust. Rousseau answers that legitimacy arises from collective self-governance, with freedom realized through participation in the general will.
These differences reflect deeper disagreements about human nature, freedom, and the purpose of political association. For Hobbes, humans are passionate creatures requiring external restraint; for Locke, they are rational creatures capable of cooperation; for Rousseau, they are beings capable of moral transformation through political participation. Each theory continues to shape contemporary political thought, from debates about security and liberty to questions of constitutional design and democratic legitimacy. The social contract tradition remains alive precisely because the questions these thinkers posed have no final answers, only temporary settlements that each generation must re-examine.
