James Harold Wilson, Baron Wilson of Rievaulx (11 March 1916 – c. 23 May 1995), was a British politician who twice served as Prime Minister of the United Kingdom, from 1964 to 1970 and from 1974 to 1976. He was Leader of the Labour Party from 1963 to 1976, Leader of the Opposition twice from 1963 to 1964 and again from 1970 to 1974, and a Member of Parliament (MP) from 1945 to 1983. Wilson is the only Labour leader to have formed governments following four general elections.
Born in Huddersfield, Yorkshire, to a politically active lower middle-class family, Wilson studied philosophy, politics and economics at Jesus College, Oxford. He was later an Economic History lecturer at New College, Oxford, and a research fellow at University College, Oxford. Elected to Parliament in 1945, Wilson was appointed to the Attlee government as a Parliamentary secretary; he became Secretary for Overseas Trade in 1947, and was elevated to the Cabinet shortly thereafter as President of the Board of Trade. Following Labour's defeat at the 1955 election, Wilson joined the Shadow Cabinet as Shadow Chancellor, and was moved to the role of Shadow Foreign Secretary in 1961. When Labour leader Hugh Gaitskell died in January 1963, Wilson won the leadership election to replace him, becoming Leader of the Opposition.