Ralph Bunche (1903-1971) was an American diplomat and political scientist who received the Nobel Peace Prize in 1950. He was the first African American to win the Nobel Peace Prize. Bunche served as the United Nations Mediator in Palestine, where he played a crucial role in negotiating peace between Israel and Arab states. He earned his PhD from Harvard University and taught at UCLA before joining the U.S. State Department. His diplomatic achievements in the Middle East earned him international recognition and the Nobel Peace Prize.