rsial terms in the political vocabulary, exciting both revulsion and inspiration. This book examines the reasons for those views, and explains why ideologies deserve respect as a major form of political thinking. It investigates the centrality of ideology both as a political phenomenon and as an organizing framework of political thought and action. It explores the changing understandings of ideology as a concept, and the arguments of the main ideologies. By employing the latest insights from a range of disciplines, the reader is introduced to the vitality and force of a crucial resource at the disposal of societies, through which sense and purpose is assigned to the political world.