Adlai Ewing Stevenson II (February 5, 1900 – July 14, 1965) was an American politician and diplomat who was the United States ambassador to the United Nations from 1961 until his death in 1965. He previously served as the 31st governor of Illinois from 1949 to 1953 and was the Democratic Party nominee for president of the United States in 1952 and 1956, losing both elections to Dwight D. Eisenhower. Stevenson was the grandson of Adlai Stevenson, the 23rd vice president of the United States. He was raised in Bloomington, Illinois. After a short stint in the U.S. Navy at the end of World War I, he became a lawyer. He served in many positions in the federal government during the Franklin D. Roosevelt and Harry Truman presidential administrations, including in the Department of the Navy, and the State Department during World War II. In 1945, he served on the committee that created the United Nations, and was a member of the initial U.S. delegations to the UN.
In 1948, Stevenson was elected governor of Illinois, defeating incumbent governor Dwight H. Green in an upset.