An Old and continuing tendency amongst critics of Kant's thought on ethics has been to maintain that since the categorical imperative merely provides a formal condition for the rightness of actions – that the principle of the action be universalizable without contradiction – it is inadequate as a test for the rightness of actions. Such critics as Hegel, Mill, and recently, R.P. Wolff, have suggested the same fundamental objection to Kant's doctrine: the requirement that a maxim be universalizable is formally (...) compatible with any action whatsoever being right. (shrink)