At the present moment, when the very existence of international law as a practical element in the conduct of human affairs is doubted or derided by many and when such precepts as are claimed to be fundamental in that law itself are daily set at nought by belligerents in the world conflict, it has been thought that a brief outline of the earliest conceptions characterizing international jurisprudence will prove neither, useless nor unwelcome.

The term “International Law” has, in the usage of our day, quite superseded the earlier expression “law of nations,” long since adopted as a translation of the Latin phrase jus gentium. The expression “International Law,” however, so familiar to us, properly denotes a wholly variant conception. In modern days it is used by the celebrated D’Aguesseau and occurs in Volume II of his works, page 337 in the edition of 1773; it is shortly afterward employed by Bentham in his “Principles of Morals and Legislation” (XVII, 326, n. 1), and has since his time come into general use. D’Aguesseau’s expression (droit entre les gens) is doubtless, in its turn, an adaptation from Zouche, Professor of Civil Law at Oxford, who uses, about 1650, the term jus inter gentes in harmony with the thought of Grotius as expressed in the opening paragraph of the Prolegomena to his De Jure Belli Ac Pacis, where Grotius explains at the outset the intended subject of his great treatise, — at jus illud quod inter populos plures aut populorum rectores intercedit, sire ab ipsa natura profectum, aut divinis constitutum legibus, sine moribus et pacto tacito introductum, attigerunt pauci, universim ac certo ordine tractavit hactenus nemo; cum tamen id fieri intersit humani generis.