The global conflict that resulted in the creation of the United Nations was World War II. This devastating war, fought from 1939 to 1945, involved many nations and led to unprecedented loss of life and widespread destruction. In the aftermath, there was a strong desire among world leaders to prevent future conflicts and promote global cooperation. This led to the establishment of the United Nations in 1945, intended to foster international dialogue, security, and development. The UN sought to address issues of human rights, peacekeeping, and humanitarian aid in the post-war world.