Dean Acheson

Dean Acheson (1893–1971) was an American politician and lawyer who served as the 51st U.S. secretary of state from 1949 to 1953 under President Harry S. Truman. He helped design the Truman Doctrine, the Marshall Plan, and the North Atlantic Treaty Organization. He was Truman's main foreign policy adviser from 1945 to 1947 during the early Cold War.