A Natural History of Seeds
Johannes Rohbeck, born 1947, read philosophy, German literature and linguistics, politics and sociology at the university of Bonn and the Freie Universität in Berlin. He has been visiting professor in Italy and at Dickinson College in Carlisle (PA). He has bee professor for practical philosophy at the Technische Universität Dresden since 1993.
Helmut Holzhey, born 1937, read theology, philosophy and sociology. He has been professor for history of philosophy at the University of Zurich 1978–2004.