Thomas Piketty's book 'Capital in the Twenty-First Century' has revolutionized the way people think about economic history. It has achieved numerous bestseller awards and has won the Financial Times and McKinsey Business Book of the Year Award and the British Academy Medal. Piketty's conclusions about extreme inequality have rocked the neo-liberal economic establishment and challenged free market economists. The book is based on a mountain of evidence and data that has never been properly analyzed before. It examines the history of income and wealth inequality and how it has evolved over the centuries.