Premise: United Nations . A replacement for the ineffective League of Nations , the organization was established on 24 October 1945 after World War II in order to prevent another such conflict . The UN Charter was drafted at a conference between April -- June 1945 in San Francisco , and was signed on 26 June 1945 at the conclusion of the conference ; this charter took effect 24 October 1945 , and the UN began operation . United Nations Parliamentary Assembly . The idea was raised at the founding of the League of Nations in the 1920s and again following the end of World War II in 1945 , but remained dormant throughout the Cold War .
Hypothesis: United Nations was established after World War 1.
Label: CONTRADICTION