Hans Jonas studied Philosophy and Jewish Studies in Berlin, Freiburg and Heidelberg and achieved his Ph.D. at Marburg University where he studied under Edmund Husserl and Martin Heidegger. He left Germany in 1933. Hans Jonas taught briefly at the Hebrew University of Jerusalem before moving to North America. In 1950 he moved to Canada in order to teach at Carleton University. From 1955 to 1976 he was Alvin Johnson Professor of Philosophy at the New York School for Social Research in New York City. His most influential books, including The Gnostic Religion and The Imperative of Responsibility, focus on natural philosophy and ethical and social problems created by technology. He died in 1993.