The phrase "the war to end all wars" is famously associated with Woodrow Wilson, who was a frontrunner in the post-World War I peace movement. This phrase encapsulated Wilson's hope that the first World War would be the last global conflict, leading to a new era of peace and international cooperation. Wilson advocated for the establishment of the League of Nations to promote diplomacy and prevent future wars. However, the phrase became tragically ironic, as the instability and unresolved conflicts from the war ultimately contributed to the rise of World War II.