Richard Henson attempts to take the sting out of this view of Kant on moral worth by arguing (i) that attending to the phenomenon of the overdetermination of actions leads one to see that Kant might have had two distinct views of moral worth, only one of which requires the absence of cooperating inclinations, and (ii) that when Kant insists that there is moral worth only when an action is done from the motive of duty alone, he need not also (...) hold that such a state of affairs is morally better, all things considered, than one where supporting inclination is present. Henson's proposals seem to me both serious and plausible. I do not think that either of his models, in the end, can take on the role Kant assigns to moral worth in the argument of the Groundwork. But seeing the ways Henson's account diverges from Kant's makes clearer what Kant intended in his discussion of those actions he credits with moral worth. [...] An action has moral worth if it is required by duty and has as its primary motive the motive of duty. The motive of duty need not reflect the only interest the agent has in the action (or its effect); it must, however, be the interest that determines the agent's acting as he did. (shrink)

During the 1760s and 1770s, Kant entertained a naturalistic approach to ethics based on the supposed psychological fact of a human love for freedom. During the critical period, especially in the Groundwork for the Metaphysics of Morals, Kant clearly rejected such an approach. But his attempt at a metaphysical foundation for ethics in section III of the Groundwork was equally clearly a failure. Kant recognized this in his appeal to the "fact of reason" argument in the Critique of Practical Reason, (...) but thereby gave up on any attempt to ground the fundamental principle of morality at all. So it is of interest to see how far we might now proceed along the lines of his original naturalistic approach. (shrink)

The author presents and defends three theses: (1) "the first is that it is not profitable for us at present to do moral philosophy; that should be laid aside at any rate until we have an adequate philosophy of psychology." (2) "the second is that the concepts of obligation, And duty... And of what is morally right and wrong, And of the moral sense of 'ought', Ought to be jettisoned if this is psychologically possible...." (3) "the third thesis is that (...) the differences between the well-Known english writers on moral philosophy from sidgwick to the present day are of little importance." (staff). (shrink)