Woodrow Wilson. The invigoration of principles and the assertion of power: a new president takes charge ; Passive in arms but active in words: the American neutral as teacher and redeemer ; American principles on trial: words accompany arms to the battlefront ; The expansion of democratic war aims: self-determination and the disintegration of empires ; The bittersweet legacy of ideas: Wilson leaves an indelible mark -- Harry Truman. The lessons of two world wars: Truman emends and enhances the internationalist tradition ; Containment with a Wilsonian twist: power-politics and the democratic mission rendered compatible ; The problematic moralism of United States foreign policy: Germany, Czechoslovakia, and Yugoslavia ; The increasing disparity between long-term hopes and short-term goals: NSC-68, NATO, and Point Four ; The ongoing importance of Wilson's and Truman's views and achievements regarding the mission and power of the United States.