Although successful in preventing a third world war, the UN was unable to prevent the Cold War, which for decades threatened to escalate into a nuclear holocaust.
यांसारखी विनाशकारी युद्धे भविष्यात टाळता यावीत म्हणून १९१९ साली राष्ट्रांचे लीग स्थापण्यात आले.