One of the distinguished and singular Medievalists of his generation, Howard Kaminsky wrote the most important study of the Hussite movement of 14th century Bohemia. While continuing to mine Czech history, he opened an altogether new field of study in French medieval history with a monograph on the resolution of the Great Schism in the Catholic church at the Council of Constance in 1414-1418. An empiricist and traditional Marxist, he eschwed all theoretical approaches to history, but applied his astonishing intelligence to the widest range of topics from science fiction and contemporary historiography to homosexuality and Hitler’s Final Solution.