This book is a high-level examination of each of the major ideologies that have shaped political thinking, action and conflict. Each chapter provides a critical overview of the current state of the major ideologies and a retrospective assessment of the strengths, weaknesses, developments and transformations of these ideologies over the past century. The volume poses a strong challenge to those who have loudly proclaimed the "end of ideology", by demonstrating that it is impossible to understand current political developments without an appreciation of their ideological context. It features internationally respected contributors who are authorities in their fields, and will be an invaluable resource for both students and specialists in areas including Politics and International Relations.