Ted Robert Gurr is distinguished professor at University of Maryland. He is an internationally known authority on the causes and management of political violence and ethnic conflict. He has been a senior consultant to the U.S. government's State Failure Task Force. Jack A. Goldstone, PhD (1981), is Hazel Professor of Public Policy at George Mason University, Senior Research Fellow at RANEPA, Moscow, and the author of Revolution and Rebellion in the Early Modern World (1993) and many other works of comparative history.