Professor Clemens has written or edited more than twenty books including Blood Debts: What Putin and Xijinping Owe Their Victims, North Korea and the World, Complexity Science and World Affairs, Dynamics of International Relations: Conflict and Mutual Gain in An Era of Global Interdependence; Getting to Yes in Korea, America and the World, 1898-2025, Achievements, Failures, Alternative Futures; and The Baltic Transformed: Complexity Theory and European Security. He has written about Russia and Ukraine for Europe'a Edge, Center for European Policy Analysis; also many book chapters, scholarly articles, and newspaper articles in the areas of international relations and comparative politics. He is now working on Three Revolutions That Shape Our World: Literacy, Free Thought, and Human Development; also, on Cold Warrior for Peace.