Margaret Thatcher became leader of the British Conservative Party in 1975, and prime minister in 1979, holding both positions until 1990. It was after the Conservative defeat in 1974 that she rose to prominence as the standard bearer of the right wing...

An attitude of frugality towards public expenditure and a belief in the supremacy of market forces. Mrs Margaret Thatcher in 1970 as UK Secretary of State for Education, by abolishing free school milk, gained the former reputation; as Prime Minister of...

Thatcherism is the system of political thought attributed to the governments of Margaret Thatcher, British Prime Minister from 1979 to 1990. Thatcher was unusual among British Conservative Prime Ministers in that she was a highly ideological leader —...