Jean-Pierre Cléro is Professor of Philosophy at the University of Rouen and Director of the Centre Bentham (Sciences Po - Paris). He contributed to the edition and translation of Bentham’s Introduction to the Principles of Morals and Legislation (Vrin, Paris, 2011). He is the author of many books on classical utilitarianism: Bentham, philosophe de l’utilité, and Calcul moral ou comment raisonner en éthique (A. Colin, Paris, 2004). He also translated many other books of Bentham, Stuart Mill, Moore, Harsanyi. The problem that leads him in ethics was first the functioning of passions and then is the question what is a fiction ? in different fields like epistemology and ethics (conducing to the book Essai sur les fictions, Hermann, Paris, mai 2014). About the questions of ethics he has much published in reviews (Revue Française d’Éthique appliquée, Cahiers de l’espace éthique de l’université Paris Sud) and much taught in universities and university hospitals. His activity is not limited to the theoretical field. He is a member of several French « espaces éthiques » where the question is to give a piece of advice on ethical problems that arise today. He never separates his occupation of teaching and writing from these of practical activity of counsel in ethical questions (at Rouen: CHU & CHR -psychiatry- ; and abroad, in Belgium, Spain, Romania and Quebec with which the University of Rouen is actually connected).