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CHAP. III. them was entirely historical, and no distinction in essence could ever be established between them. It is almost unnecessary to add that the confusion between Jus Gentium, or Law common to all Nations, and international law is entirely modern. The classical expression for international law is Jus Feciale or the law of negotiation and diplomacy. It is, however, unquestionable that indistinct impressions as to the meaning of Jus Gentium had considerable share in producing the modern theory that the relations of independent states are governed by the Law of Nature.

It becomes necessary to investigate the Greek conceptions of nature and her law. The word φύσις, which was rendered in the Latin natura and our nature, denoted beyond all doubt originally the material universe, but it was the material universe contemplated under an aspect which—such is our intellectual distance from those times—it is not very easy to delineate in modern language. Nature signified the physical world regarded as the result of some primordial element or law. The oldest Greek philosophers had been accustomed to explain the fabric of creation as the manifestation of some single principle which they variously asserted to be movement, force, fire, moisture, or generation. In its simplest and most ancient sense, Nature is precisely the physical universe looked upon in this way as the