24.2.1956 Born in Ratingen (near Düsseldorf), Germany.
10.1974-12.80 Studies of sociology, philosophy and history at the universities of Münster (Germany) and Bologna (Italy);
15.12.1980 Master’s degree (“Magister Artium”) in sociology with a master’s thesis on “Political ecology” and philosophy and ancient history as minor subjects from the University of Münster.
1.1981-4.1982 Alternative service in a social institution for elder and handicapped people (Mobiler Sozialer Hilfsdienst in Münster).
5.1982-7.1986 Graduate studies in philosophy and sociology at the universities of Münster (Germany) and Berlin (Freie Universität, Germany) and preparation of a dissertation.
10.1985-6.1986 Scientific assistant at the institute of philosophy at the University of Münster; working field: tutoring of courses in formal logic.
14.7.1986 Ph. D. (“Doktor der Philosophie”) in philosophy at the University of Münster with a dissertation “Practical Theory of Argumentation – Theoretical Foundations, Praktical Justification and Rules of Some Important Types of Argument” (“Praktische Argumentationstheorie – Theoretische Grundlagen, praktische Begründung und Regeln wichtiger Argumentationsarten”) and sociology and ancient history as minor subjects; grade: summa cum laude.
10.1986-2.87 Teaching classes in philosophy at the University of Oldenburg (Germany); subjects: philosophy of language, philosophy of science.
1.1987-4.93 Assistant professor (“Hochschulassistent”) of philosophy at the University of Osnabrück (Germany).
3.-6.1990 Visiting professor at the Istituto di Filosofia dell’ Università degli studi di Urbino (Italy).
11.2.1993 Habilitation (“Habilitation”) for philosophy at the University of Osnabrück with a habilitation thesis “Rational Altruism – A Prudentialist Theory of Rationality and Altruism” (“Rationaler Altruismus – Eine prudentielle Theorie der Rationalität und des Altruismus”).
10.1993-10.1999 Associate professor (“Hochschuldozent”) of philosophy at the University of Osnabrück.
9.-12.1994 Visiting Scholar at the Department of Philosophy of the University of Michigan in Ann Arbor (USA).
26.4.1995 Nomination as an extra-budgetary professor (“Außerplanmäßiger Professor”) at the University of Osnabrück.
11.1999-3.2002 Contract professor (“Professore a contratto”) at the University of Siena (Italy) and, alternating, leading researcher in the research project “How good is life?”, financed by the German National Research Council (DFG) at the University of Osnabrück.
4.2002-10.2016 Associate professor (“professore associato”) of Moral Philosophy at the University of Siena.
since 11.2016 Full professor (“professore ordinario”) of Moral Philosophy at the University of Siena.
I am married with Dr. med. Eleonore Lumer. We have two children.