This book is a companion volume to the Blackwell Dictionary of Sociology by Allan Johnson. It is hoped that it will be of value to students and teachers of political science alike. It should be noted that it is concerned with the terminology of the subject. The names of specific politicians and political parties cannot be found here. On the other hand, where a policy or a movement has a general significance - for example, privatization, nationalization, socialism or christian democracy - it is included.