Margaret Thatcher's political career dramatically altered British society through her implementation of conservative policies during her time as Prime Minister from 1979-1990. Known as the "Iron Lady", she championed free-market reforms, privatization of state-owned industries, and stringent labor union regulations. These policies aimed to combat inflation and stimulate economic growth but also resulted in increased social inequality. Thatcher’s governance promoted a shift towards individualism over state welfare, reshaping public attitudes towards government intervention. Her legacy remains controversial, prompting debate over the long-term effects of her reforms on both British society and global politics.