c) The Charter of the United Nations

The Charter of the United Nations, a landmark treaty championed by the U.S., established the United Nations and its initial policies in 1945. The charter was signed by 50 countries at the United Nations Conference on International Organization in San Francisco. It laid the foundation for the UN’s structure, objectives, and operating principles, with the aim of promoting international cooperation, peace, and security. The U.S.’s leadership in the creation of the UN and its commitment to the charter demonstrated its dedication to a new international order based on collective security and cooperation.