She was the first woman to become prime minister breaking a huge barrier at the time. Thatcher was nicknamed "The Iron Lady" that got to be related with her uncompromising governmental issues and initiative style. As Prime Minister, she executed approaches that have come to be known as Thatcherism.. Thatcher came from a middle-class background, her dad being a grocer. She was a university educated chemist who had her sight set on a political career. The Conservative party under Edward Heath won the 1970 general election, and Thatcher was hence selected to the Cabinet as Secretary of State for Education and Science. The Heath administration lost party support and Thatcher became the party leader. Thatcher assumed the PM office