Paul Cliteur is Professor of Jurisprudence, University of Leiden and previously Professor of Philosophy, University of Delft. His research is in the field of ethics and the philosophical foundations of the law. Publications include: The Secular Outlook: In Defense of Moral and Political Secularism (Wiley-Blackwell 2010 and Esperanto Moral: Por una ética autónoma, Barcelona 2009. In 1995 he presented an inaugural address at the University of Delft on Animal Rights and Animal Welfare.