CHUN Chaesung is a Professor at the Department of Political Science and International Relations at Seoul National University. He is also a director of National Security Center of East Asian Institute (EAI). He was the President of the Korean Association of International Studies in 2021, a Director of Center for International Studies at Seoul National University, and a Vice President of the Institute of Peace and Unification Studies, Seoul National University. He was a visiting professor at Keio University in Tokyo from 2017-2018, and 2010-2011. He is currently a member of the Advisory Committee of the Ministry of Foreign Affairs, Ministry of Unification, Ministry of Defense, ROK Army and Navy. Major books include Sovereignty and International Relations: Northeast Asian International Relations Theory: Politics among Incomplete Sovereign States (2020), Sovereignty and International Relations: Modern Sovereign States System and the Evolution of the Empire (2019), Is Politics Moral: Reinhold Niebuhr’s Transcendental Realism (2012), East Asian International Relations (2011).