Book excerpt: This book defends the claim that politics is a linguistically constituted activity and shows that the concepts which inform political beliefs and behaviour undergo changes related to real political events. Having set out and discussed this theme, the editors and contributors go on to analyse the evolution of thirteen particular concepts, all central to political discourse in the western world. They include revolution, rights, democracy, property, corruption, public interest, public opinion, and ideology. The volume will be illuminating to political theorists, intellectual historians, and philosophers.