This volume provides a critical assessment of the wide spectrum of Hayek's celebrated work as economist and social philosopher. Included are papers on Hayek's early writings in the field of monetary economics, on which his later campaign against inflation, his controversial proposal for competing currencies, and his negative view of the impact of trade unions on the economy are based. Hayek's social philosophy, often regarded as the centre piece of his famous work, and the fundamental findings about human thinking, society, the market system and social rules of conduct it is based on, is evaluated by leading contemporary social philosophers. The volume leaves little doubt as to the considerable impact of Hayek's thinking on economic policy and social philosophy.