Patrick Kain

A better appreciation of Kant’s commitments in a variety of disciplines reveals Kant had a deeper understanding of human and non-human animals than generally recognized, and this sheds new light on Kant’s claims about the nature and scope of moral status and helps to address, at least from Kant’s perspective, many of the familiar objections to his notorious account of “duties regarding animals.” Kant’s core principles about the nature of moral obligation structure his thoughts about the moral status of human beings and non-human animals. Kant’s commitments in biology, psychology, anthropology and physical geography support his account of the nature of and distinction between humans and non-human animals. This account supports Kant’s judgment that we have duties to every human being and significant duties regarding non-human animals, duties which involve direct concern for animals because of their nature. A comparison of Kant’s account with some recently proposed Kantian alternatives provides additional perspective on some of the distinctive features, and strengths and weaknesses, of Kant’s approach.

This essay addresses the relationship between Kant's theory of moral motivation and theories of normativity. Constructivist or "ideal agent" theories of normativity claim that what makes a principle normative is that rational agents endorse or possess a motive of a certain kind to comply with it, or that they endorse or possess such a motive to comply with it insofar as they are rational. Korsgaard has argued that Kant's "motivational analysis" of the concept of obligation in Grundlegung I provides an argument for such a constructivist theory of normativity. In this examination of Korsgaard's argument, I defend two important modifications of the concept of "intrinsic normativity" and suggests that once these modifications are made, the motivational analysis argument fails to establish the constructivist claim that the normative authority of the supreme principle of morality is constituted by or depends solely upon agents' motivational states. While Kant's motivational analysis helps to reveal the nature of the alleged internal relation between the supreme principle of morality and the nature of the rational will, it does not demand the adoption of a constructivist theory of normativity.