Clifford Rosenberg, lead author of Concise Edition Volume 2 (Ph.D., Princeton University) is associate professor of European history at City College and the Graduate Center, CUNY. Professor Rosenberg specializes in the social and political history of modern Europe, especially France, and on the relationship between the continent and its colonial hinterlands. He has published a book on immigration control and the transformation of citizenship in interwar France. His current research concerns the spread of tuberculosis from France to Algeria and back, and efforts to combat it, from 1830 to the present. He is also the co-editor of Worlds Together, Worlds Apart: A Companion Reader 4th Edition.