In this study of French liberalism in the first half of the nineteenth century and its continuing relevance to political theory and practice, emphasis is given to the tensions and fissures within liberalism as well as to its struggles against Jacobinism, conservatism and socialism. It is a blend of political theory, biography and intellectual and political history informed throughout by the author’s distinctive political, moral and religious sensibilities. A major theme of great relevance to current debate about liberalism is the contrast between the vigor and brilliance of these thinkers as political critics, their inefficacy as political actors and their ultimate retreat from political life.