" From all which it is evident, that though the things of nature are given in common, yet man, by being master of himself, and " proprietor of his own person, and the actions or labour of it, had still in himself the great foundation of property;" and that which made up the greater part of what he applied to the support or comfort of his being, when invention and arts had improved the conveniencies of life, was perfectly his own, and did not belong in common to others. "

― John Locke , Two Treatises of Government and A Letter Concerning Toleration