Moral Health, Moral Prosperity, and Universalization in Kant’s Ethics

Drawing on an analysis of the distinction between perfect and imperfect duties suggested by The Metaphysics of Morals, I argue that Kant’s Categorical Imperative (CI) requires that maxims be universalizable in the sense that they can be regarded as universal laws consistent with the integrity and effective exercise of rational agency. This account, I claim, has a number of advantages over Korsgaard’s practical contradiction interpretation of the CI both in terms of the criteria of assessment that Korsgaard uses and in those of broader textual considerations.