Abstract

Distinguishes basic and more extreme ideas underlying three related Kantian themes: that fundamental questions of moral philosophy require an a priori method, that moral duties are conceived as categorical imperatives, and that moral agents have autonomy of the will. Arguably, an a priori method is needed for analysis and assessment of rationality claims, and we can act on moral reasons implicit in the humanity formula without a sense of constraint or an objectionably impartial attitude. The idea of a noumenal world is not a premise of Kantian ethics, but a conclusion to which Kant thought his ethics inevitably led.