Margaret Thatcher was the first female Prime Minister of the United Kingdom, holding the office from 1979 to 1990. As the longest-serving Prime Minister of the 20th century, she implemented policies known as "Thatcherism" and earned the nickname "The Iron Lady" for her uncompromising leadership style. The document discusses Thatcher's impact and legacy, offering advice inspired by her determination and resilience such as communicating your vision, taking risks, and being relentless in achieving goals.