Political theory is usually at its most vital and interesting in periods of political crisis and uncertainty. This is as true today as it was for Plato, Machiavelli, Hobbes and Marx.The aim of this much needed textbook is to provide students with both a review and an analysis of the wealth of literature in the area and to provide a genuinely introductory account of modern political thought. An important feature of the book is its use of practical examples to stimulate students' thinking on questions of political value and political principle. Raymond Plant writes throughout with vigor and clarity. This book will be essential reading for students of politics, government and political philosophy.