Margaret Hilda Thatcher is the first woman to have held the office of prime minister in Great Britain. She was born Margaret Hilda Roberts in Grantham, Lincolnshire and educated at the University of Oxford, where she earned degrees in chemistry. After graduation she worked as a research chemist from 1947 to 1951. She married Denis Thatcher in 1951, and in 1953, having studied for the bar, she became a tax lawyer. Thatcher joined the Conservative party, and was elected to the House of Commons in 1959. She defeated Edward Heath for the minority leadership of the party in 1974, and then led the Conservative party to victory in 1979. T