The notable figures in the founding of the United Nations include Franklin D. Roosevelt, Winston Churchill, and Eleanor Roosevelt. FDR, as the President of the United States during World War II, was a pivotal advocate for the establishment of an international organization to promote peace and prevent future conflicts. Churchill, as the British Prime Minister, collaborated closely with FDR on war efforts and diplomacy leading to the UN's formation. Eleanor Roosevelt played a critical role in drafting the Universal Declaration of Human Rights, emphasizing the importance of human rights in the UN’s mission. Their contributions were instrumental in shaping the UN's foundational principles.