Abstract

The book introduces a conception of discourse ethics, an intersubjectivist version of Kantian ethics. Analysing contributions by Jürgen Habermas, Karl-Otto Apel, Wolfgang Kuhlmann, Albrecht Wellmer, Robert Alexy, Klaus Günther, Rainer Forst, Marcel Niquet and others, it reconstructs critical discussions of the justification of the principle of morality (Part I) and the various proposals for its application (Part II). It defends an alternative model of how discourse ethics can provide guidance in non-ideal circumstances and avoid both arbitrariness and rigorism.