Immanuel Kant (1724–1804) argued that moral requirements are based on a standard of rationality he dubbed the “Categorical Imperative” (CI). Immorality thus involves a violation of the CI and is thereby irrational. Other philosophers, such as Locke and Hobbes, had also argued that moral requirements are based on standards of rationality. However, these standards were either desirebased instrumental principles of rationality or based on sui generis rational intuitions. Kant agreed with many of his predecessors that an analysis of practical reason (...) will reveal only the requirement that rational agents must conform to instrumental principles. Yet he argued that conformity to the CI (a non-instrumental principle) and hence to moral requirements themselves, can nevertheless be shown to be essential to rational agency. This argument was based on his striking doctrine that a rational will must be regarded as autonomous, or free in the sense of being the author of the law that binds it. The fundamental principle of morality — the CI — is none other than the law of an autonomous will. Thus, at the heart of Kant's moral philosophy is a conception of reason whose reach in practical affairs goes well beyond that of a Humean ‘slave’ to the passions. Moreover, it is the presence of this self-governing reason in each person that Kant thought offered decisive grounds for viewing each as possessed of equal worth and deserving of equal respect. (shrink)

This is a survey article in which I explore some important recent work on the topic in question, Kant’s formula of the end in itself (or “formula of humanity”). I first provide an overview of the formulation, including what the formula seems roughly to be saying, and what Kant’s main argument for it seems to be. I then call the reader’s attention to a variety of questions one might have about the import of and argument for this formula, alluding to (...) some of the works in which philosophers have recently raised or tried to answer these questions. Then, for the bulk of the paper, I focus my discussion on two issues of contention: the identity of the “end in itself” that the formula refers to, and the relation between the value of the end in itself and the value of other ends. I do not attempt to argue for a particular position of my own regarding these issues. Instead, I explain a number of the more interesting or influential recent attempts to answer these questions, compare these approaches in various ways, draw implications from them, and raise concerns about some of them. I also suggest that an important link connects the question about the identity of the end in itself and the question about the relation between the value of the end in itself in relation to the value of other ends: How one answers these questions commits one to a position on the thorny issue of whether, how, and how fully, autonomy is manifested through empirical (not simply pure) practical reason. (shrink)

Why should we be interested in Kant's ethical theory? One reason is that we find his views about our moral responsibilities appealing. Anyone who thinks that we should treat other people with respect, that we should not use them as a mere means in ways to which they could not possibly consent, will be attracted by a Kantian style of ethical theory. But according to recent supporters of Kant, the most distinctive and important feature of his ethical theory is not (...) his claims about the particular ethical duties that we owe to each other, but his views about the nature of value. They argue that Kant has an account of the relationship between practical reason and value, known as "Kantian constructivism" that is far superior to the traditional "value realist" theory, and that it is because of this that we should accept his theory.1 It is now standard for both supporters and critics to claim that Kant's moral theory stands or falls with Kantian constructivism.2 But this is a mistake. In this paper, I sketch a rival Kantian theory of value, which I call Kantian value realism. I argue that there is textual evidence that Kant himself accepted value realism rather than constructivism. Whilst my aim in this paper is to set out the theory clearly rather than to defend it, I will try to show that Kantian value realism is preferable to Kantian constructivism and that it is worthy of further study. (shrink)

In the Groundwork, Kant seems to make two paradoxical claims about the source of human dignity. First, he claims that if “rational nature exists as an end in itself” (Kant, 1998, p. 36), it is because “humanity is… dignity, insofar it is capable of morality” (Kant, 1998, p. 42). Second, he claims that although “autonomy is the ground of the dignity of human nature and of every rational nature” (Kant, 1998, p. 43), the human being can only have “dignity… insofar (...) he fulfils all his duties” (Kant, 1998, p. 46). This paper argues that neither claim is repugnant because Kant seeks to advance two kinds of dignity. Kant intends to elucidate that the human being possesses a basic ‘entitled dignity’ in virtue of his capacity for morality, but that he needs to become a moral being in order for him to realise his ‘true dignity’. This paper claims that the formal condition under which a person can be worthy of respect is identical with the condition of realising his ‘true dignity’. (shrink)