There is a single example which very strikingly illustrates the effects of the theory of natural law on modern society, and indicates how very far are those effects from being exhausted. There cannot, I conceive, be any question that to the assumption of a Law Natural we owe the doctrine of the fundamental equality of human beings. That "all men are equal" is one of a large number of legal propositions which, in progress of time, have become political. The Roman jurisconsults of the Antonine era lay down that "omnes homines natura aequales sunt," but in their eyes this is a strictly juridical axiom. They intend to affirm that, under the hypothetical Law of Nature, and in so far as positive law approximates to it, the arbitrary distinctions which the Roman Civil Law maintained between classes of persons cease to have a legal existence. The rule was one of considerable importance to the Roman practitioner, who required to be reminded that, wherever Roman jurisprudence was assumed to conform itself exactly to the code of Nature, there was no difference in the contemplation of the Roman tribunals between citizen and foreigner, between freeman and slave, between Agnate and Cognate. The jurisconsults who thus expressed themselves most certainly never intended to censure the social arrangements under which civil law fell somewhat short of its speculative type; nor did they apparently believe that the world would ever see human society completely assimilated to the economy of nature. But when the doctrine of human equality makes its appearance in a modern dress it has evidently clothed itself with a new shade of meaning. Where the Roman jurisconsult had written "aequales sunt," meaning exactly what he said, the modern civilian wrote "all men are equal" in the sense of "all men ought to be equal." The peculiar Roman idea that natural law coexisted with civil law and gradually absorbed it, had evidently been lost sight of, or had become unintelligible, and the words which had at most conveyed a theory concerning the origin, composition, and development of human institutions, were beginning to express the sense of a great standing wrong suffered by mankind. As early as the beginning of the fourteenth century, the current language concerning the birth-state of men, though visibly intended to be identical with that of Ulpian and his contemporaries, has assumed an altogether different form and meaning. The preamble to the celebrated ordinance of King Louis Hutin enfranchising the serfs of the royal domains would have sounded strangely to Roman ears. "Whereas, according to natural law, everybody ought to be born free; and by some usages and customs which, from long antiquity, have been introduced and kept until now in our realm, and peradventure by reason of the misdeeds of their predecessors, many persons of our common people have fallen into servitude, therefore, We, etc." This is the enunciation not of a legal