Realists about practical reasons agree that judgments regarding reasons are beliefs. They disagree, however, over the question of how such beliefs motivate rational action. Some adopt a Humean conception of motivation, according to which beliefs about reasons must combine with independently existing desires in order to motivate rational action; others adopt an anti-Humean view, according to which beliefs can motivate rational action in their own right, either directly or by giving rise to a new desire that in turn motivates the (...) action. I argue that the realist who adopts a Humean model for explaining rational action will have a difficult time giving a plausible account of the role that desire plays in this explanation. I explore four interpretations of this role and argue that none allows a Humean theory to explain rational action as convincingly as an anti-Humean theory does. The first two models, in different ways, make acting on a reason impossible. The third allows this possibility, but only by positing a reason-sensitive desire that itself demands an explanation. The fourth avoids this explanatory challenge only by retreating to an empty form of the Humean view. In contrast, an anti-Humean theory can provide an intuitively plausible explanation of rational action. I conclude that the realist about reasons should adopt an anti-Humean theory to explain rational action. (shrink)

Requirements of rationality, like the following, have recently been the focus of much discussion: (1) Rationality requires of S that, if S intends that e and believes that e will not be so unless S intends that m, then S intends that m. (2) Rationality requires of S that S not both believe p and believe not-p.1 How many requirements there are and how precisely to state them is a matter of controversy, but I will focus on a different kind (...) of controversy, namely, how to conceive of such requirements in general.2 I will start by sketching a picture of their general nature and role that I find compelling and attractive. My picture is not, however, consistent with many of the recent approaches to rational requirements in the literature. 3 As I will try to show, the arguments that are often made about rational requirements assume, mostly implicitly, that my picture is flawed. These arguments do not, however, or so I will claim, actually give us reason to reject my picture of rational requirements. Indeed, many of the puzzles about rational requirements taken up by others turn out not to really be puzzles once we realize that this alternative picture.. (shrink)

The project of this paper is to address a complaint, by Prichard, against Plato and other ancients, as committing a basic “mistake” in moral philosophy. The basic mistake is in thinking that we are capable of giving reasons for the requirements of duty, rather than directly and immediately apprehending those requirements. Prichard’s argument that this is a mistake consists in an argument that attempts to give reasons for such requirements always fail. He classes those attempts into two kinds, and one (...) of those kinds is exemplified by Plato. (I leave aside here the second kind.) My response is to show two things. First, Plato does not make the egregious mistake of substituting interest for duty, and thus giving the wrong kind of reason for duty’s requirements, as Prichard alleges. This allegation assumes, first, that they duty and interest are entirely distinct notions, and, second, that we have a clear and accurate sense of the contents and bounds of each. Neither of these assumptions is accepted by Plato, and appreciating what their denial involves is essential to grasping the enterprise of moral philosophy as the ancients practiced it. Second, we should see that enterprise as being comprehensive in a sense Prichard simply ignores. They are seeking what we now call wide reflective equilibrium in judgments about both duty and interest, and to see this I focus on a puzzle in how to understand much of ancient moral philosophizing. This puzzle is how to make sense of the work the ancients see formal constraints on happiness as supporting their preferred views of happiness (or interest). I claim that they way they do so is a mess on any picture other than one of a search for wide reflective equilibrium, and this way of engaging not only our thoughts about duty and interest, but what it is to be human, and to lead a human life, make the ancient model far more satisfying than Prichard’s recommendation that we give it all up as a mistake. (shrink)