"Equidem existimo, judices, cùm in omni genere ac varietate artium, etiam illarum, quæ sine summo otio non facilè discuntur, Cn. Pompeius excellat, singularem quandam laudem ejus et præstabilem esse scientiam, in fæderibus, pactionibus, conditionibus, populorum, regum, exterarum nationum: in universo denique bellijure ac pacis."—Cic. Orat. pro L. Corn. Balbo, c. 6.
Information on this subject is scattered over an immense variety of voluminous compilations; not accessible to every one, and of which the perusal can be agreeable only to very few. Yet so much of these treaties has been embodied into the general law of Europe, that no man can be master of it who is not acquainted with them. The knowledge of them is necessary to negotiators and statesmen; it may sometimes be important to private men in various situations in which they may be placed; it is useful to all men who wish either to be acquainted with modern history, or to form a sound judgment on political measures. I shall endeavour to give such an abstract of it as may be sufficient for some, and a convenient guide for others in the farther progress of their studies. The treaties, which I shall more particularly consider, will be those of Westphalia, of Oliva, of the Pyrenees, of Breda, of Nimeguen, of Ryswick, of Utrecht, of Aix-la-Chapelle, of Paris (1763), and of Versailles (1783). I shall shortly explain the other treaties, of which the stipulations are either alluded to, confirmed, or abrogated in those which I consider at length. I shall subjoin an account of the diplomatic intercourse of the European powers with the Ottoman Porte, and with other princes and states who are without the pale of our ordinary federal law; together with a view of the most important treaties of commerce, their principles, and their consequences.
As an useful appendix to a practical treatise on the law of nations, some account will be given of those tribunals which in different countries of Europe decide controversies arising out of that law; of their constitution, of the extent of their authority, and of their modes of proceeding; more especially of those courts which are peculiarly appointed for that purpose by the laws of Great Britain.
Though the course, of which I have sketched the outline, may seem to comprehend so great a variety of miscellaneous subjects, yet they are all in truth closely and inseparably interwoven. The duties of men, of subjects, of princes, of law-givers, of magistrates, and of states, are all parts of one consistent system of universal morality. Between the most abstract and elementary maxim of moral philosophy, and the most complicated controversies of civil or public law, there subsists a connexion which it will be the main object of these lectures to trace. The principle of justice, deeply rooted in the nature and interest of man, pervades the whole system, and is discoverable in every part of it, even to its minutest ramification in a legal formality, or in the construction of an article in a treaty.
I know not whether a philosopher ought to confess, that in his inquiries after truth he is biased by any consideration; even by the love of virtue. But I, who conceive that a real philosopher ought to regard truth itself chiefly on account of its subserviency to the happiness of mankind, am not ashamed to confess, that I shall feel a great consolation at the conclusion of these lectures, if, by a wide survey and an exact examination of the conditions and relations of human nature, I shall have confirmed but one individual in the conviction, that justice is the permanent interest of all men, and of all commonwealths. To discover one new link of that eternal chain by which the Author of the universe has bound together the happiness and the duty of his creatures, and indissolubly fastened their interests to each other, would fill my heart with more pleasure than all the fame with which the most ingenious paradox ever crowned the most eloquent sophist.
I shall conclude this Discourse in the noble language of two great orators and philosophers, who have, in a few words, stated the substance, the object, and the result of all morality, and politics, and law.
"Nihil est quod adhuc de republicâ putem dictum, et quo possim longius progredi, nisi sit confirmatum, non modo falsum esse illud, sine injuriâ non posse, sed hoc verissimum, sine summâ justitiâ rempublicam regi non posse."—Cic. Frag. lib. ii. de Repub.
"Justice is itself the great standing policy of civil society, and any eminent departure from it, under any circumstances, lies under the suspicion of being no policy at all."—Burke's Works, vol. iii. p. 207.