The “state of nature” is a thought experiment philosophers use to imagine human life before governments, laws, or political authority existed. What governs it depends on which thinker you ask, but the answers cluster around a few core ideas: reason, self-preservation, natural compassion, and the threat of violence. These aren’t just historical curiosities. They shaped modern ideas about human rights, the purpose of government, and why cooperation exists at all.
The Stoic Answer: Universal Reason
The oldest Western answer comes from the Stoics, who argued that a divine rational principle called the Logos governs all of nature, including human behavior. The Logos was not a distant deity but the ordering force woven into reality itself. Marcus Aurelius described it as the reason that “informs all Substance, and governs the Whole from ordered cycle to cycle through all eternity.” For the Stoics, human rationality was simply a fragment of this universal reason. To live well meant aligning yourself with it.
This idea became the seed of natural law theory: the notion that certain moral truths exist independently of any government or legal code, discoverable through reason alone. That concept traveled through Roman law (where it was called jus naturale) and remains a foundation of modern human rights thinking. The Cornell Legal Information Institute still defines natural law as a system of principles “based on human nature’s fundamental ideas of right and wrong rather than on legislation.”
Hobbes: Fear, Competition, and the War of All Against All
Thomas Hobbes offered the bleakest picture of the state of nature. Without a central authority to keep order, he argued, three forces drive human conflict. First, people compete violently for basic necessities and material gain. Second, they fight out of fear for their personal safety, striking preemptively against potential threats. Third, they seek reputation and glory, partly for its own sake and partly because a fearsome reputation deters others from attacking.
In this condition, Hobbes saw no binding moral law. The only governing principle is a fundamental right of self-preservation: you are entitled to save your own life by whatever means you think necessary. This is what makes the state of nature a “war of all against all,” not because people are constantly fighting, but because no one can ever feel safe. The solution, for Hobbes, was to surrender individual power to a sovereign authority through a social contract, trading natural freedom for security.
Locke: Reason and the Law of Nature
John Locke painted a far more optimistic state of nature. He argued that even without government, a discoverable “law of nature” governs human conduct, and that law is accessible through reason alone. Its fundamental command: as much as possible, mankind is to be preserved. This isn’t arbitrary. Locke believed God created humans with rational faculties specifically so they could work out moral principles on their own, and that human reason and divine reason are “sufficiently analogous” for the task.
Where Hobbes saw the state of nature as lawless, Locke saw it as governed but unenforced. Everyone has natural rights to life, liberty, and property, and everyone has the right to punish those who violate the law of nature. The problem isn’t the absence of law but the absence of an impartial judge. People tend to be biased in their own cases, which is why government becomes necessary, not to create rights, but to protect ones that already exist.
Rousseau: Self-Love and Natural Compassion
Jean-Jacques Rousseau rejected both Hobbes and Locke for projecting civilized habits onto primitive humans. In his view, the earliest state of nature was governed by two instincts that operate before reason even develops. The first is amour de soi, a basic drive toward self-preservation shared by all creatures. The second is pitié, an instinctual compassion that makes humans reluctant to see others suffer.
In the most primitive human existence, compassion balances and restrains self-interest. People in this state are neither moral nor immoral; they simply follow instinct. Genuine morality, Rousseau argued, only emerges later, when reason develops and people begin applying it to their conduct. The tragedy, in his telling, is that civilization corrupts these natural instincts. As societies grow more complex, people develop amour propre, a competitive vanity that replaces simple self-love and poisons social life.
Kant: Freedom and the Duty to Leave
Immanuel Kant took a different angle entirely. He held that every rational being has an innate right to freedom, and that this right exists in the state of nature. But Kant also argued that people have a duty to leave the state of nature and enter a civil society governed by a social contract. Without political institutions, individuals exist in a state of war with each other, not necessarily because they are violent, but because there is no legal framework to guarantee anyone’s rights. Freedom without law is unstable. The moral law, expressed through Kant’s categorical imperative, demands that people create political structures capable of preserving the freedom they already possess by nature.
Natural Rights Versus Natural Laws
One useful distinction cuts across all these thinkers: the difference between a natural right and a natural law. A right is a liberty, something you are free to do. A law is a constraint, something you are obligated to do or refrain from doing. Hobbes emphasized the right side of this divide: in the state of nature, you have the right to do anything necessary for survival. Locke emphasized the law side: reason reveals binding obligations that limit what you may do to others even before any government exists.
Natural law principles are typically framed as prohibitions. You may not deliberately act against a basic good like human life. Positive obligations, such as the duty to actively help others, are more contextual and harder to apply universally. This is why the right to life, a negative right that forbids killing, has proven more durable in legal and philosophical traditions than positive rights that require action. Modern natural law theory ascribes this right to all human beings, including those whose rational capacities are not yet developed, on the grounds that possessing a rational nature is sufficient.
What Biology Actually Shows
Philosophers imagined the state of nature from their armchairs, but evolutionary biology and anthropology offer evidence about how humans and other animals actually behave without central authority. Two mechanisms stand out. Kin selection explains self-sacrifice among relatives: an organism will accept costs to itself if the benefits flow to close genetic relatives. In a classic study of vampire bats, over 90% of food sharing occurred between mothers and daughters or grandparents and grandchildren. Reciprocal altruism, proposed by Robert Trivers in 1971, explains cooperation among unrelated individuals: I help you now because you’ll help me later. This works when the cost of helping is small relative to the benefit received, the helper can withhold future aid from cheaters, and there’s a time gap between the initial favor and the return.
Game theory formalizes this logic. The Prisoner’s Dilemma, where two individuals each benefit from betraying the other but both lose if both betray, captures the core problem of cooperation without trust. Research published in Nature found that cooperation can emerge among selfish individuals precisely because of selfishness: when the long-term reward of belonging to a cooperative group is large enough, individuals spontaneously choose to cooperate rather than defect.
How Hunter-Gatherers Actually Governed Themselves
The closest real-world analogue to a “state of nature” may be the egalitarian hunter-gatherer bands that characterized most of human prehistory. These groups were strikingly flat in their power structures, and researchers have proposed a specific reason why. The widespread availability of handheld weapons like clubs, sticks, and stones created what anthropologists call an “antagonistic balance of deterrence.” No single individual could dominate others because anyone could fight back with lethal force. A well-known saying among the San Bushmen captures this: “We are none of us big, and others small; we are all men and we can fight.”
When individuals did try to dominate, these groups used coalitionary punishment, where the rest of the group collectively sanctioned the would-be tyrant. This form of reverse dominance hierarchy maintained egalitarianism for tens of thousands of years, only breaking down with the Neolithic revolution, when agriculture created surplus resources that could be hoarded and defended. In other words, the “state of nature” was governed not by a single principle but by a combination of armed equality, group enforcement, and the practical limits of power in small-scale societies.