Biographical note

Alan Karras, lead media author and author of the Worlds Together, Worlds Apart AP Edition (Ph.D. University of Pennsylvania) is the associate director of International and Area Studies at the University of California at Berkeley and has previously served as chair of the College Board's test development committee for world history and as co-chair for the College Board's commission on AP history course revisions. The author and editor of several books, he has written about the eighteenth-century Atlantic World and, more broadly, global interactions that focus on illicit activities like smuggling and corruption. An advocate of linking the past to the present, he is now working on a history of corruption in empires, focusing on the East India Company. Elizabeth Pollard, lead author of Volume 1 (Ph.D., University of Pennsylvania) is associate professor of history at San Diego State University. Her research investigates women accused of witchcraft in the Roman world and explores the exchange of goods and ideas between the Mediterranean and the Indian Ocean in the early centuries of the Common Era. Her pedagogical interests include digital humanities approaches to Roman history and witchcraft studies as well as the impact of global perspectives on teaching, learning, and writing about the ancient Mediterranean. 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. He specializes in the history of modern France and its empire and is the author of Policing Paris: The Origins of Modern Immigration Control between the Wars. He is working now on a book about the spread of tuberculosis between France and Algeria since the mid-nineteenth century. Robert Tignor, general editor emeritus (Ph.D., Yale University) is professor emeritus and the Rosengarten Professor of Modern and Contemporary History at Princeton University and the three-time chair of the history department. With Gyan Prakash, he introduced Princeton's first course in world history thirty years ago. Professor Tignor has taught graduate and undergraduate courses in African history and world history and has written extensively on the history of twentieth-century Egypt, Nigeria, and Kenya. Besides his many research trips to Africa, Professor Tignor has taught at the University of Ibadan in Nigeria and the University of Nairobi in Kenya.