Professor Clemens has written or edited more than 20 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 at the Center for European Policy Analysis, as well as 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 and on Cold Warrior for Peace.