Keith Sinjohn Joseph, Baron Joseph, known asSir Keith Joseph, 2nd Baronet, for most of his political life, was a British politician.
A member of the Conservative Party, he served as a minister under four prime ministers: Harold Macmillan, Alec Douglas-Home, Edward Heath, and Margaret Thatcher. He was a key influence in the creation of what came to be known as Thatcherism.
Joseph introduced the concept of the social market economy into Britain, an economic and social system inspired by Christian democracy. He also co-founded the Centre for Policy Studies writing its first publication: Why Britain needs a Social Market Economy.
