“Splendid isolation” is no longer practicable in the modern world of international relations. Group alliances in pursuit of the Balance of Power are seen to be nothing else than an idle feint. For the sole and constant aim of each such group and Power is not to achieve or to maintain the balance, but to weight it on one side. Such an alternating and oscillating balance gives the maximum of insecurity, and thus plays most effectively the game of war and armaments. The only possible alternative is the creation of such a concert or confederation of Powers as shall afford to each the best available security against the aggression of another within the concert and the best defense of all against aggression from outside. [Sidenote: A confederation for security against aggression.] The general form in which a cooperation of nations for these objects presents itself is that of a League or Confederation. The primary object of such a League is to bind all its members to submit all their serious differences to arbitration or some other mode of peaceful settlement, and to accept the judgment or award thus obtained. Some advocates of a League of Peace think that the sense of moral obligation in each State, fortified by the public opinion of the civilized world, would form a valid sanction for the fulfilment of such undertakings, and would afford a satisfactory measure of security. But most hold that it is advisable or essential that the members of such a League should bind themselves to take joint action against any member who breaks the peace. [Sidenote: Success depends on the size of the nucleus of leagued States. League of Peace must have absolute preponderance of force.]