One formulation of the Categorical Imperative tells us to treat humanity as an end in itself. It has become common to think that ‘humanity’ (die Menschheit) here refers to some minimal power of rationality that is necessarily possessed by any rational agent, but I argue that this common reading is misguided. Instead, ‘humanity’ refers to a good will, the will of a being who is committed to moral principles. This good will reading of ‘humanity’ is not only suggested by passages (...) in which Kant specifically discusses humanity, but also is more consistent with the main ideas of Kant's ethics. (shrink)