Charles K. Armstrong is the Korea Foundation Professor of Korean Studies in the Social Sciences, Department of History, at Columbia University. He is the author of Tyranny of the Weak: North Korea and the World, 1950 1992and"The North Korean Revolution, 1945 1950", both from Cornell, and "The Koreas", editor of "Korean Society: Civil Society, Democracy and the State", and coeditor of "Korea at the Center: Dynamics of Regionalism in Northeast Asia."