This collection examines the life and thought of Agnes Heller, who rose to international acclaim as a Marxist dissident in Eastern Europe. Heller went on to develop one of the most comprehensive oeuvres in contemporary philosophy, putting forward a distinctive ethical theory and developing insightful analyses of a vast range of topics. Here, philosophers, sociologists, journalists and political scientists assess different elements of Heller's work, highlight relevant shifts within that work, and address its intrinsic consistency.