Rainer Forst's lecture at the Holberg Prize Symposium 2007. The Symposium was in honor of Holberg Prize laureate 2007 Ronald Dworkin. Rainer Forst is Professor of Political Theory and Philosophy at Johann Wolfgang Goethe-University of Frankfurt. He specializes in political and moral philosophy and democratic theory. Among his publications are Contexts of Justice (University of California Press, 2002), Toleranz im Konflikt (Suhrkamp, 2003; engl. transl. forthcoming with Cambridge University Press) and Das Recht auf Rechtfertigung (Suhrkamp, 2007). Less