"Hayek on Liberty" is a concise yet exhaustive and provocative study of this classic liberal philosopher. It examines the structure and impact of Hayek's system of ideas and locates his position within Western philosophy. Not available since the 1980s, this updated 3rd edition contains a a substantial new chapter in which Gray assesses how far the historical development of the last ten years can be deployed in a critique of Hayek's thought. Gray's reassessment is not only a provoking study of a classical philosopher; it is also a timely contribution to the debate over the future of conservatism.