The United Nations played a pivotal role in post-war Europe by fostering cooperation among nations to prevent future conflicts and promote recovery from World War II. Established in 1945, the UN aimed to maintain international peace and security and address humanitarian concerns. In Europe, the UN facilitated aid through initiatives like the Marshall Plan, which helped rebuild war-torn economies. Additionally, it supported the establishment of new democratic governments and promoted human rights, contributing significantly to the integration of Europe and the eventual formation of the European Union.