Many contemporary writers on International Law tacitly assume that the doctrines of their system, founded on principles of equity and common sense, were capable of being readily reasoned out in every stage of modern civilisation. But this assumption, while it conceals some real defects of the international theory, is altogether untenable, so far as regards a large part of modern history. It is not true that the authority of the Jus Gentium in the concerns of nations was always uncontradicted; on the contrary, it had to struggle long against the claims of several competing systems. It is again not true that the territorial character of sovereignty was always recognised, for long after the dissolution of the Roman dominion the minds of men were under the empire of ideas irreconcileable with such a conception. An old order of things, and of views founded on it, had to decay—a new Europe, and an apparatus of new notions congenial to it, had to spring up—before two of the chiefest postulates of International Law could be universally conceded.
It is a consideration well worthy to be kept in view, that during a large part of what we usually term modern history no such conception was entertained as that of "territorial sovereignty." Sovereignty was not associated with dominion over a portion or subdivision of the earth. The world had lain for so many centuries under the shadow of
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