This book tells the extraordinary story of the Pinochet regime's economists, known as the "Chicago Boys". It explores the roots of their ideas and their sense of mission, following their training as economists at the Department of Economics at the University of Chicago. After their return to Chile, the "Chicago Boys" took advantage of the opportunity afforded them by the 1973 military coup to launch the first radical free market strategy implemented in a developing country. The ideological strength of their mission and the military authoritarianism of General Pinochet combined to transform an economy that, following the return to democracy, has stabilized and is now seen as a model for Latin America. This book, written by a political scientist, examines the neo-liberal economists and their perspective on the market. It also narrates the history of the transfer of ideas from the industrialized world to a developing country, which will be of particular interest to economists.