Christian Leuprecht is associate professor of political science at the Royal Military College of Canada and cross-appointed to the School of Policy Studies and Department of Political Studies at Queen’s University. He is the author of a dozen books and 60 peer-reviewed articles and other publications on the strategic, political, economic, security and cultural implications of demographic change.

Jack A. Goldstone is Virginia E. and John T. Hazel, Jr. Professor and Director of the Center for Global Policy in the School of Public Policy at George Mason University, and a non-resident fellow at the Brookings Institution. He is the author of Revolution and Rebellion in the Early Modern World, awarded the 1993 Distinguished Scholarly Research Award of the American Sociological Association; Why Europe? The Rise of the West in World History; and nine other books as well as over one hundred research articles on topics in politics, social movements, democratization, and long-term social change. His latest book is Political Demography: How Population Changes are Reshaping International Security and National Politics (Oxford University Press, 2011).