John Locke (1632–1704) was, along with Thomas Hobbes, one of the two greatest English political theorists of the seventeenth century. Unlike Hobbes, however, who provided a justification for monarchical absolutism, Locke’s Second Treatise of Government, published anonymously in 1690, argued that government is an agreement between governors and the governed. The people submit to governmental authority in return for protection of their life, liberty, and property, and the governors’ fundamental task is to provide those essential protections. According to Locke, a government that failed to do so or became tyrannical lost its claim to legitimacy, and could therefore be cast off by the governed.

87. Man being born, as has been proved, with a title to perfect freedom and an uncontrolled enjoyment of all the rights and privileges of the law of Nature, equally with any other man, or number of men in the world, hath by nature a power not only to preserve his property — that is, his life, liberty and estate against the injuries and attempts of other men; but to judge of and punish the breaches of that law in others, as he is persuaded the offense deserves, even with death itself, in crimes where the heinousness of the fact, in his opinion, requires it. But because no political society can be, nor subsist, without having in itself the power to preserve the property, and in order thereunto punish the offenses of all those of that society, there, and there only is political society where every one of the members hath quitted this natural power, resigned it up into the hands of the community in all cases that exclude him not from appealing for protection to the law established by it. And thus all private judgment of every particular member being excluded, the community comes to be umpire, and by understanding indifferent rules and men authorized by the community for their execution, decides all the differences that may happen between any members of that society concerning any matter of right, and punishes those offenses which any member hath committed against the society with such penalties as the law has established; whereby it is easy to discern, who are, and are not, in political society together. Those who are united into one body, and have a common established law and judicature to appeal to, with authority to decide controversies between them and punish offenders, are in civil society one with another; but those who have no such common appeal, I mean on earth, are still in the state of Nature, each being where there is no other, judge for himself and executioner; which is, as I have before showed it, the perfect state of Nature.

88. And thus the commonwealth comes by a power to set down what punishment shall belong to the several transgressions they think worthy of it, committed amongst the members of that society (which is the power of making laws) as well as it has the power to punish any injury done unto any of its members by any one that is not of it (which is the power of war and peace); and all this for the preservation of the property of all the members of that society, as far as is possible. But though every man entered into society has quitted his power to punish offenses against the law of Nature in prosecution of his own private judgment, yet with the judgment of offenses which he has given up to the legislative, in all cases where he can appeal to the magistrate, he has given up a right to the commonwealth to employ his force, for the execution of the judgments of the commonwealth whenever he shall be called to it, which, indeed, are his own judgments, they being made by himself or his representative. And herein we have the original of the legislative and executive power of civil society, which is to judge by standing laws how far offenses are to be punished when committed within the commonwealth; and also by occasional judgments founded on the present circumstances of the fact, how far injuries from without are to be vindicated; and in both these to employ all the force of all the members when there shall be need.

89. Wherever, therefore, any number of men so unite into one society as to quit every one his executive power of the law of Nature, and to resign it to the public, there and there only is a political or civil society. And this is done wherever any number of men, in the state of nature, enter into society to make one people one body politic under one supreme government; or else when any one joins himself to, and incorporates with any government already made. For hereby he authorizes the society, or which is all one, the legislative thereof, to make laws for him as the public good of the society shall require; to the execution whereof his own assistance (as to his own decrees) is due. And this puts men out of a state of Nature into that of a commonwealth, by setting up a judge on earth with authority to determine all the controversies and redress the injuries that may happen to any member of the commonwealth; which judge is the legislative or magistrates appointed by it. And wherever there are any number of men, however associated, that have no such decisive power to appeal to, there they are still in the state of Nature.

90. And hence it is evident that absolute monarchy, which by some men is counted for the only government in the world, is indeed inconsistent with civil society, and so can be no form of civil government at all. For the end of civil society being to avoid and remedy those inconveniencies of the state of nature which necessarily follow from every man’s being judge in his own case by setting up a known authority to which every one of that society may appeal upon any injury received, or controversy that may arise, and which every one of the society ought to obey. Wherever any persons are who have not such an authority to appeal to, and decide any difference between them there, those persons are still in the state of Nature. And so is every absolute prince in respect of those who are under his dominion.

91. For he being supposed to have all, both legislative and executive, power in himself alone, there is no judge to be found, no appeal lies open to any one, who may fairly and indifferently, and with authority decide, and from whence relief and redress may be expected of any injury or inconveniency that may be suffered from him, or by his order. So that such a man, however entitled, Czar, or Grand Signior, or how you please, is as much in the state of Nature, with all under his dominion, as he is with the rest of mankind. For wherever any two men are, who have no standing rule and common judge to appeal to on earth, for the determination of controversies of right betwixt them, there they are still in the state of Nature, and under all the inconveniencies of it, with only this woeful difference to the subject, or rather slave of an absolute prince. That whereas, in the ordinary state of nature, he has a liberty to judge of his right, and according to the best of his power to maintain it; but whenever his property is invaded by the will and order of his monarch, he has not only no appeal, as those in society ought to have, but as if he were degraded from the common state of rational creatures, is denied a liberty to judge of, or to defend his right, and so is exposed to all the misery and inconveniencies that a man can fear from one, who being in the unrestrained state of Nature, is yet corrupted with flattery and armed with power.

92. For he that thinks absolute power purifies men’s bloods, and corrects the baseness of human nature, need read but the history of this, or any other age, to be convinced of the contrary.

From John Locke, Two Treatises on Civil Government (London: George Routledge and Sons, 1887), pp. 234–38.