Dean Acheson (1893-1971) was an attorney and statesman who served as Secretary of State from 1949 to 1953 under President Harry Truman. A key architect of the Truman Doctrine and the Marshall Plan, Acheson stressed the importance of multilateral organizations in the fight against totalitarianism. Prior to his service in the Truman Administration, Acheson clerked for Supreme Court Justice Louis Brandeis, worked at Washington law firm Covington & Burling, and served as Undersecretary of the Treasury for one year under President Franklin Roosevelt.