This review article considers the potentially fruitful relationship between the history of political thought and parliamentary history through a survey of recent books on Britain and France. Traditionally, this relationship has not been intimate, as the major historians of political thought have concentrated on linguistic and philosophical contexts, alongside political economy. However, as historians of political thought turn to concepts such as political representation, constitutionalism, party politics, and parliamentarism in the eighteenth and nineteenth centuries, it would be beneficial for parliamentary history to play a greater role. In order to place arguments in their non-intellectual contexts effectively, historians of political thought must become more careful analysts of events, institutions, and quotidian politics, as well as broader historiographical contexts, importantly the history of state formation. This review article argues that the development of parliamentarism in the eighteenth and nineteenth centuries is an especially promising area for considering theory and practice in unison.