|Of Civil Government|
The Liberal Political Theory of John Locke
And that all men may be restrained from invading others' rights, and from doing hurt to one another, and the law of Nature be observed, which willeth the peace and preservation of all mankind, the execution of the law of Nature is in that state put into every man's hands, whereby every one has a right to punish the transgressors of that law to such a degree as may hinder its violation. For the law of Nature would, as all other laws that concern men in this world, be in vain if there were nobody that in the state of Nature had a power to execute that law, and thereby preserve the innocent and restrain offenders; and if any one in the state of Nature may punish another for any evil he has done, every one may do so. For in that state of perfect equality, where naturally there is no superiority or jurisdiction of one over another, what any may do in prosecution of that law, every one must needs have a right to do.
Though the legislative, whether placed in one or more, whether it be always in being or only by intervals, though it be the supreme power in every common-wealth, yet, first, it is not, nor can possibly be, absolutely arbitrary over the lives and fortunes of the people. For it being but the joint power of every member of the society given up to that person or assembly which is legislator, it can be no more than those persons had in a state of Nature before they entered into society, and gave it up to the community. For nobody can transfer to another more power than he has in himself, and nobody has an absolute arbitrary power over himself, or over any other, to destroy his own life, or take away the life or property of another. A man, as has been proved, cannot subject himself to the arbitrary power of another; and having, in the state of Nature, no arbitrary power over the life, liberty, or possession of another, but only so much as the law of Nature gave him for the preservation of himself and the rest of mankind, this is all he doth, or can give up to the commonwealth, and by it to the legislative power, so that the legislative can have no more than this. Their power in the utmost bounds of it is limited to the public good of the society. It is a power that hath no other end but preservation, and therefore can never have a right to destroy, enslave, or designedly to impoverish the subjects; the obligations of the law of Nature cease not in society, but only in many cases are drawn closer, and have, by human laws, known penalties annexed to them to enforce their observation. Thus the law of Nature stands as an eternal rule of all men, legislators as well as others. The rules that they make for other men's actions must, as well as their own and other men's actions, be conformable to the law of Nature- i.e., to the will of God, of which that is a declaration, and the fundamental law of Nature being the preservation of mankind, no human sanction can be good or valid against it.
From John Locke, Two Treatises on Civil Government.