John O. Voll is professor of Islamic history and associate director of the Prince Alwaleed bin Talal Center for Muslim-Christian Understanding at Georgetown University. He taught Middle Eastern, Islamic, and world history at the University of New Hampshire for thirty years before moving to Georgetown in 1995. He graduated from Dartmouth College and received his Ph.D. degree from Harvard University. He has lived in Cairo, Beirut, and Sudan and has traveled widely in the Muslim world. The second edition of his book Islam: Continuity and Change in the Modern World appeared in 1994. He is co-author, with John L. Esposito, of Islam and Democracy and Makers of Contemporary Islam and is editor, author, or co-author of six additional books. He is a past president of the Middle East Studies Association and also of the New England Historical Association. He has served on the Boards of Directors of the American Council of Learned Societies, the New Hampshire Humanities Council, the New Hampshire Council on World Affairs, and the Sudan Studies Association. He was the chair of the program committee for the 1999 annual meeting of the American Historical Association. In 1991 he received a Presidential Medal in recognition for scholarship on Islam from President Husni Mubarak of Egypt. He has published numerous articles and book chapters on modern Islamic and Sudanese history.