Firstly, then, it must be able to adjudicate upon all international disputes whatever. Its first function must clearly be that. Before a war can break out there must be the possibility of a world decision upon its rights and wrongs. The League, therefore, will have as its primary function to maintain a Supreme Court, whose decisions will be final, before which every sovereign power may appear as plaintiff against any other sovereign power or group of powers. The plea, I take it, will always be in the form that the defendant power or powers is engaged in proceedings "calculated to lead to a breach of the peace," and calling upon the League for an injunction against such proceedings. I suppose the proceedings that can be brought into court in this way fall under such headings as these that follow; restraint of trade by injurious tariffs or suchlike differentiations or by interference with through traffic, improper treatment of the subjects _or their property_ (here I put a query) of the plaintiff nation in the defendant state, aggressive military or naval preparation, disorder spreading over the frontier, trespass (as, for instance, by airships), propaganda of disorder, espionage, permitting the organization of injurious activities, such as raids or piracy. Clearly all such actions must come within the purview of any world-supreme court organized to prevent war. But in addition there is a more doubtful and delicate class of case, arising out of the discontent of patches of one race or religion in the dominions of another. How far may the supreme court of the world attend to grievances between subject and sovereign?