Margaret Thatcher

Margaret Hilda Thatcher, Baroness Thatcher (née Roberts; 13 October 1925 – 8 April 2013), was an English stateswoman who served as Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party from 1975 to 1990. She was the longest-serving British prime minister of the 20th century and the first woman to hold the office. As prime minister, she implemented policies that came to be known as Thatcherism.