In the growth of systems of “National Law”[T] there has been evolved from small beginnings an ever-widening jurisdiction. Impartial courts have inspired confidence which stimulated individuals to seek their aid, and this has reacted to extend their jurisdiction, until now the most intimate and complex relations between individuals, at one time wholly without their sphere, are in these days submitted as a matter of course to judicial settlement. Even questions of individual honor are settled according to the well-developed principles of libel and slander which were once considered as requiring a duel for their satisfaction. [T] In contradistinction to “International Law.” A similar growth may be expected in the jurisdiction of the international tribunal. Upon the reputation which it shall succeed in establishing for impartiality, freedom from race and national prejudices, regard for broad principles of law and equity, and the thoroughness and ability with which it shall discharge its high duties within its present sphere, will largely depend the extent to which an advancing public opinion will enlarge its jurisdiction until it shall embrace various classes of questions now declared non-arbitrable. No detailed classification, however, can be thought of; each difficulty as it arises must be determined in view of the surrounding circumstances with due regard to the growing public feeling in favor of judicial settlement. Under the system of voluntary arbitration there is abundant room for growth, for the _onus_ will be thrown on each contending state to square its conduct with that growing feeling in favor of arbitration which it will become more and more difficult to ignore. In every country the growth of law and the extension of the jurisdiction of the courts which administered it have been concurrent; the same rule must govern in the field of international law. There are vast fields at present untouched by the law of nations. The discovery of the New World threw the jurists of that day into bewilderment as to how rights in the American continents might be acquired and established. A period of doubt and dispute ensued, until finally Grotius, by applying certain rules of Roman law regarding the acquirement of rights by individuals through purchase, possession, etc., and by inventing certain other rules, helped to supply a legal foundation upon which the acquisition of these territories could be regulated. Looking toward the future, one can see that, since there are no more continents to be discovered and the habitable parts of the earth have been already taken possession of by the colonial pioneer, the great principle of the survival of the fittest must henceforth mainly work itself out in competitions confined to the existing territories of the various powers. This will necessitate the consideration of some deep questions concerning the life and death of nations and the heirship to their dominions.[U]