"Before I read a line from the great liberal economists, I knew from my father's accounts that the free market was like a vast sensitive nervous system, responding to events and signals all over the world to meet the ever-changing needs of peoples in different countries, from different classes, of different religions, with a kind of benign indifference to their status," she wrote in her memoirs.
"The economic history of Britain for the next 40 years confirmed and amplified almost every item of my father's practical economics. In effect, I had been equipped at an early age with the ideal mental outlook and tools of analysis for reconstructing an economy ravaged by state socialism."
Educated at Oxford, Thatcher began her political career in her mid-20s with an unsuccessful 1950 campaign for a parliamentary seat in the Labour Party stronghold of Dartford. She earned nationwide publicity as the youngest female candidate in the country despite her loss at the polls.
She was defeated again the next year, but on the campaign trail she met Denis Thatcher, a successful businessman whom she married in 1951. Their twins, Mark and Carol, were born two years later.
"She was beautiful, gay, very kind and thoughtful," Denis Thatcher said in an interview 25 years later.
"Who could meet Margaret without being completely slain by her personality and intellectual brilliance?"
As the first male Downing Street spouse, Denis Thatcher stayed out of the limelight to a large degree while supporting his wife on her many travels and public engagements. He was said to give her important behind-the-scenes advice on Cabinet choices and other personnel matters, but this role was not publicly discussed.
Margaret Thatcher first won election to Parliament in 1959, representing Finchley in north London. She climbed the Conservative Party ladder quickly, joining the Cabinet as education secretary in 1970.