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This long-awaited book sets out the implications of Habermas's theory of communicative action for moral theory. "Discourse ethics" attempts to reconstruct a moral point of view from which normative claims can be impartially judged. The theory of justice it develops replaces Kant's categorical imperative with a procedure of justification based on reasoned agreement among participants in practical discourse.Habermas connects communicative ethics to the theory of social action via an examination of research in the social psychology of moral and interpersonal development.