Liberalism is the dominant ideology of our time, yet its character remains the subject of intense scholarly and political controversy. Debates about the liberal political tradition - about its history, its central philosophical commitments, its implications for political practice - lie at the very heart of the discipline of political theory. Many outstanding political theorists have contributed to the growing sophistication of these debates in recent years, but the original voice of Michael Freeden deserves particular attention. In the course of a body of work that spans over thirty years, Freeden's iconoclastic contributions have posed important challenges to the dominant understandings of liberal ideology, history, and theory. Such work has sought to redefine the very essence of what it is to be a liberal. This book brings together an international group of historians, philosophers, and political scientists to evaluate the impact of Freeden's work and to reassess its central claims.