Historian, since 2000 employed at the Institute of History of the Polish Academy of Sciences, where since 2011 he heads the Department of Totalitarian Systems and the History of World War II. He is currently professor at the Cardinal Stefan Wyszyński University in Warsaw. Professor Kornat is editor of the 1938 volume of Polish Diplomatic Documents, author of studies on Polish sovietological thought, and of three monographs on Polish interwar foreign policy. He’s also Member of the Scientific Council of European Network Remembrance and Solidarity.