I can predict with absolute certainty that within another generation there will be another world war if the nations of the world do not concert the method by which to prevent it.

Speech in Omaha, Nebraska (8 September 1919), as recorded in Addresses of President Wilson (1919), p. 75 and in "The Public Papers of Woodrow Wilson (Authorized Edition) War and Peace: Presidential Messages, Addresses, and Public Papers (1917-1924) Volume II Page 36; Wilson later used this phrase in his address in Pueblo, Colorado, in what has been called his League of Nations Address (25 September 1919)[Note: this phrase is not in Wilson's address in Pueblo, Colorado (25 September 1919). He made a much softer statement making the inevitability of a future war without the League implicit rather than explicit.]