sentences:  He received his PhD in philosophy in 1985 from the University of Amsterdam (supervisor Trudy van Asperen).From 1974 on he worked at the University of Amsterdam as assistant and associate professor of ethics and jurisprudence in the Philosophy Department and the Faculty of Law, as an extra-ordinary professor of medical ethics in the Faculty of Medicine, and as a full professor of ethics and its history in the Philosophy Department.In 1992 he took the initiative of founding the Netherlands School for Research in Practical Philosophy, together with Robert Heeger and Bert Musschenga, and functioned as the school's first director"."