[75] See Rivier in Holtzendorff, I. p. 412. The last English translation is that of 1854 by William Whewell.
Zouche.
§ 54. But the modern Law of Nations has another, though minor, founder besides Grotius, and this is an Englishman, Richard Zouche[76] (1590-1660), Professor of Civil Law at Oxford and a Judge of the Admiralty Court. A prolific writer, the book through which he acquired the title of "Second founder of the Law of Nations," appeared in 1650 and bears the title: "Juris et judicii fecialis, sive juris inter gentes, et quaestionum de eodem explicatio, qua, quae ad pacem et bellum inter diversos principes aut populos spectant, ex praecipuis historico jure peritis exhibentur." This little book has rightly been called the first manual of the positive Law of Nations. The standpoint of Zouche is totally different from that of Grotius in so far as, according to him, the customary Law of Nations is the most important part of that law, although, as a child of his time, he does not at all deny the existence of a natural Law of Nations. It must be specially mentioned that Zouche is the first who used the term jus inter gentes for that new branch of law. Grotius knew very well and says that the Law of Nations is a law between the States, but he called it jus gentium, and it is due to his influence that until Bentham nobody called the Law of Nations International Law.
[76] See Phillipson in The Journal of the Society of Comparative Legislation, New Series, IX. (1908), pp. 281-304.
The distinction between the natural Law of Nations, chiefly treated by Grotius, and the customary or voluntary Law of Nations, chiefly treated by Zouche,[77] gave rise in the seventeenth and eighteenth centuries to three different schools[78] of writers on the Law of Nations—namely, the "Naturalists," the "Positivists," and the "Grotians."
[77] It should be mentioned that already before Zouche, another Englishman, John Selden, in his "De jure naturali et gentium secundum disciplinam ebraeorum" (1640), recognised the importance of the positive Law of Nations. The successor of Zouche as a Judge of the Admiralty Court, Sir Leoline Jenkins (1625-1684) ought also to be mentioned. His opinions concerning questions of maritime law, and in especial prize law, were of the greatest importance for the development of maritime international law. See Wynne, "Life of Sir Leoline Jenkins," 2 vols. (1740).
[78] These three schools of writers must not be confounded with the division of the present international jurists into the diplomatic and legal schools; see above, § [51, No. 5].
The Naturalists.
§ 55. "Naturalists," or "Deniers of the Law of Nations," is the appellation of those writers who deny that there is any positive Law of Nations whatever as the outcome of custom or treaties, and who maintain that all Law of Nations is only a part of the Law of Nature. The leader of the Naturalists is Samuel Pufendorf (1632-1694), who occupied the first chair which was founded for the Law of Nature and Nations at a University—namely, that at Heidelberg. Among the many books written by Pufendorf, three are of importance for the science of International Law:—(1) "Elementa jurisprudentiae universalis," 1666; (2) "De jure naturae et gentium," 1672; (3) "De officio hominis et civis juxta legem naturalem," 1673. Starting from the assertion of Hobbes, "De Cive," XIV. 4, that Natural Law is to be divided into Natural Law of individuals and of States, and that the latter is the Law of Nations, Pufendorf[79] adds that outside this Natural Law of Nations no voluntary or positive Law of Nations exists which has the force of real law (quod quidem legis proprie dictae vim habeat, quae gentes tamquam a superiore profecta stringat).
[79] De jure naturae et gentium, II. c. 3, § 22.