Abstract

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