Abstract

Rehberg makes the astonishing claim that metaphysics caused the French Revolution. He makes this claim because of certain commitments he holds in moral philosophy, such as his skepticism of pure practical reason: for Rehberg, believing in abstract ideals that have no application in the real, empirical world can lead to dangerous results. While this connection between Rehberg’s politics and his moral philosophy has not gone unnoticed, no serious examination of the moral theory Rehberg develops in his 1787 On the Relation of Metaphysics to Religion has yet been given. This is what I accomplish in this paper. After outlining the place of Rehberg’s moral theory in the 'Relation,' I offer an interpretation of Rehberg’s conception of the principle of morality, his moral psychology, and conception of the good will. I also discuss the relationship between Rehberg’s moral theory and philosophical optimism, namely the idea that we live in the best of all possible worlds, and his account of the human condition as one of conflict between sensibility and rationality in contrast to the nature of the perfect will. The result is a richer appreciation of the systematic nature of Rehberg’s thought, as well as of the broader philosophical background of his political views.