Sigrid Müller, Dr. (1999) in Theology, University of Tübingen, is Professor of Moral Theology at the University of Vienna. She has done extensive research in the fields of Late Medieval nominalism and history of ethics, including Handeln in einer kontingenten Welt: Zu Begriff und Bedeutung der recta ratio bei Wilhelm von Ockham (Tübingen/Basel, 2000).Mag. Cornelia Schweiger is research assistant in Moral Theology at the University of Vienna. She has worked on the History of Moral Theology (especially on the question of Natural Law) and on the relationship between faith and ethics with a special focus on John Rawls.Contributors include: Heribert Smolinsky, Volker Leppin, Renate Dürr, Thomas Simon, Rudolf Schüßler, Marianne Schlosser, Hans Schelkshorn, Christian Thomas Leitmeir, Thomas Brogl, Meta Niederkorn-Bruck, Henrik Wels, Hermann Hold, Sigrid Müller and Cornelia Schweiger.