It is obvious that the speculative perfection of the Grotian system is intimately connected with that conception of territorial sovereignty which we have been discussing. The theory of International Law assumes that commonwealths are, relatively to each other, in a state of nature; but the component atoms of a natural society must, by the fundamental assumption, be insulated and independent of each other. If there be a higher power connecting them, however slightly and occasionally by the claim of common supremacy, the very conception of a common superior introduces the notion of positive law, and excludes the idea of a law natural. It follows, therefore, that if the universal suzerainty of an Imperial head had been admitted even in bare theory, the labours of Grotius would have been idle. Nor is this the only point of junction between modern public law and those views of sovereignty of which I have endeavoured to describe the development. I have said that there are entire departments of international jurisprudence which consist of the Roman Law of Property. What then is the inference? It is, that if there had been no such change as I have described in the estimate of sovereignty--if sovereignty had not been associated with the proprietorship of a limited portion of the earth, had not, in other words, become territorial--three parts of the Grotian theory would have been incapable of application. CHAPTER V PRIMITIVE SOCIETY AND ANCIENT LAW The necessity of submitting the subject of jurisprudence to scientific treatment has never been entirely lost sight of in modern times, and the essays which the consciousness of this necessity has produced have proceeded from minds of very various calibre, but there is not much presumption, I think, in asserting that what has hitherto stood in the place of a science has for the most part been a set of guesses, those very guesses of the Roman lawyers which were examined in the two preceding chapters. A series of explicit statements, recognising and adopting these conjectural theories of a natural state, and of a system of principles congenial to it, has been continued with but brief interruption from the days of their inventors to our own. They appear in the annotations of the Glossators who founded modern jurisprudence, and in the writings of the scholastic jurists who succeeded them. They are visible in the dogmas of the canonists. They are thrust into prominence by those civilians of marvellous erudition, who flourished at the revival of ancient letters. Grotius and his successors invested them not less with brilliancy and plausibility than with practical importance. They may be read in the introductory chapters of our own Blackstone, who has transcribed them textually from Burlamaqui, and wherever the manuals published in the present day for the guidance of the student or the practitioner begin with any discussion of the first principles of law, it always resolves itself