Is there a sharp dividing line separating Europe into "East" and "West"? This volume brings together prominent scholars from the United States, France, Poland, and Russia to examine the evolution of the conception of Europe over the two centuries since the French Revolution. Inspired by the ideas of Martin Malia, Evtuhov and Kotkin take a flexible view of the "cultural gradient" of ideas throughout Europe, examining the emergence, interaction, and reception of ideas in different places. The essays address three dimensions of the "cultural gradient": the history of ideas, regimes and political practices, and the contemporary political and intellectual scene. In exploring the movement of ideas across Europe, The Cultural Gradient brings a new historical perspective to the field of European studies.