It became increasingly evident that the foreign policy of the United States could not consist solely of a Caribbean policy, a Pan-American policy, and a Far Eastern policy, but that it must necessarily involve a world policy. During the years after the Spanish War the world was actively discussing peace; but all the while war was in the air. The peace devices of 1815, the Holy and the Quadruple Alliances, had vanished. The world had ceased to regard buffer states as preventives of wars between the great nations, although at the time few believed that any nation would ever dare to treat them as Germany since then has treated Belgium. The balance of power still existed, but statesmen were ever uncertain as to whether such a relation of states was really conducive to peace or to war. A concert of the Great Powers resembling the Quadruple Alliance sought to regulate such vexing problems as were presented by the Balkans and China, but their concord was not loud enough to drown the notes of discord. The outspoken word of governments was still all for peace; their proposals for preserving it were of two kinds. First, there was the time-honored argument that the best preservative of peace was preparation for war. Foremost in the avowed policies of the day, this was urged by some who really believed it, by some who hoped for war and intended to be ready for it, and by the cynical who did not wish for war but thought it inevitable. The other proposal was that war could and should be prevented by agreements to submit all differences between nations to international tribunals for judgment. In the United States, which had always rejected the idea of balance of power, and which only in Asia, and to a limited degree, assented to the concert of powers, one or the other of these two views was urged by all those who saw that the United States had actually become a world power, that isolation no longer existed, and that a policy of nonintervention could not keep us permanently detached from the current of world politics.