F. A. Hayek (1899-1992), recipient of the Presidential Medal of Freedom in 1991 and co-winner of the Nobel Prize in Economics in 1974, was a pioneer in monetary theory and a leading proponent of classical liberalism in the twentieth century. He taught at the University of London, the University of Chicago, and the University of Freiburg. Jeremy Shearmur is a fellow emeritus in philosophy at the Australian National University. His published books include The Political Thought of Karl Popper and Hayek and After: Hayekian Liberalism as a Research Programme, among others.