<P><EM>Radicalism and the Revolt Against Reason</EM> is a work that continues to have a steady and large scale impact on political and social theory fifty years since its first appearance.&nbsp;A study of how radical thought modifies its actions and ideologies in a time of unrealized and frustrated expectations, the focus is on Georges Sorel and the Europe of the <EM>fin de siècle</EM>, a time when socialist revolution was forcefully set aside by liberal reform. In a technique that presaged contemporary period, radical demands did not simply dissolve or disappear, they profoundly changed emphasis from the impersonal forces of history to highly personal forces of individual will.&nbsp;This edition includes a substantial brand new introduction by the author.</P>