Geboren 1948; 1977 Promotion; 1982 Habilitation; Professor Emeritus für Systematische Theologie, Symbolik und Religionsphilosophie an der Universität Zürich; Danforth Professor Emeritus für Religionsphilosophie an der Claremont Graduate University in Kalifornien.
2010 Bachelor of Arts (Philosophy and Theology), Oxford University; 2012 Master of Studies (Theology - Modern Doctrine), Oxford University; 2019 PhD in Philosophy of Religion and Theology, Claremont Graduate University.