I draw on neurobiological evidence to defend the rationalist thesis that moral judgments are essentially dependent on reasoning, not emotions (conceived as distinct from inference). The neuroscience reveals that moral cognition arises from domain-general capacities in the brain for inferring, in particular, the consequences of an agent’s action, the agent’s intent, and the rules or norms relevant to the context. Although these capacities entangle inference and affect, blurring the reason/emotion dichotomy doesn’t preferentially support sentimentalism. The argument requires careful (...) consideration of the empirical evidence (from neuroimaging to psychopathology) and philosophical analysis of the commitments of rationalism versus sentimentalism in ethics. (shrink)

I show that the existence of an omniscient, omnipotent, and essentially omnimalevolent being is impossible given only two metaethical assumptions (viz., moral rationalism and reasons internalism). I then argue (pace Stephen Law) that such an impossibility undercuts Law’s (Relig Stud 46(3):353–373, 2010) evil god challenge.

Moral Rationalism is the view that if an act is morally required then it is what there is most reason to do. It is often assumed that the truth of Moral Rationalism is dependent on some version of The Overridingness Thesis, the view that moral reasons override nonmoral reasons. However, as Douglas Portmore has pointed out, the two can come apart; we can accept Moral Rationalism without accepting any version of The Overridingness Thesis. (...) Nevertheless, The Overridingness Thesis serves as one of two possible explanations for Moral Rationalism. In this paper I will investigate which of these two explanations a moral rationalist should accept. I will argue that when we properly attend to the form of Moral Rationalism supported by the intuitions that motivate the view, we are left with no reason to accept The Overridingness Thesis. (shrink)

One of the most significant disputes in early modern philosophy was between the moral rationalists and the moral sentimentalists. The moral rationalists — such as Ralph Cudworth, Samuel Clarke and John Balguy — held that morality originated in reason alone. The moral sentimentalists — such as Anthony Ashley Cooper, the third Earl of Shaftesbury, Francis Hutcheson and David Hume — held that morality originated at least partly in sentiment. In addition to arguments, the rationalists and sentimentalists (...) developed rich analogies. The most significant analogy the rationalists developed was between morality and mathematics. The most significant analogy the sentimentalists developed was between morality and beauty. These two analogies illustrate well the main ideas, underlying insights, and accounts of moral phenomenology the two positions have to offer. An examination of the two analogies will thus serve as a useful introduction to the debate between moral rationalism and moral sentimentalism as a whole. (shrink)

This paper concerns the normative status of coherence of desires, in the context of moral rationalism. I argue that 'desiderative coherence' is not tied to rationality, but is rather of pragmatic, instrumental, and sometimes moral value. This means that desire-based views cannot rely on coherence to support non-agent-relative accounts of moral reasons. For example, on Michael Smith's neo-rationalist view, you have 'normative reason' to do whatever your maximally coherent and fully informed self would want you to (...) do, whether you want to do it or not. For these reasons to be non-agent-relative, coherence would have to be grounded in rationality, but I argue that it is not. I analyze, and reject, various strategies for establishing a coherence-rationality connection, considering in detail a purported analogy between desires and a priori beliefs, with particular attention to the case of mathematics. (shrink)

Moral rationalism has long been an attractive position within moral philosophy. However, among empirical-minded philosophers, it is widely dismissed as scientifically untenable. In this essay, I argue that moral rationalism’s lack of uptake in the empirical domain is due to the widespread supposition that moral rationalists must hold that moral judgments and actions are produced by rational capacities. But this construal is mistaken: moral rationalism’s primary concern is not with the relationship (...) between moral judgments and rational capacities per se, but rather with developing a conception objectivity normativity that avoids Platonism. In light of this, I develop an alternative approach to translating moral rationalism into the empirical domain that builds on the common rationalist view that normative requirements are explained by the relationship between agents and the social structures and practices in which they are embedded. I propose that this social conception of normativity can be translated into a scientific framework by interpreting it as a claim about the importance of constraint-based explanation when accounting for norm-governed behavior. In order to develop this point more concretely and show that it is empirically tractable, I turn to research on macaque social organization that highlights the ways in which normative standards are generated by empirically observable social structures. The insights garnered from the macaque case allow me to then locate moral rationalism’s core claims about the relationship between morality and the standards of practical rationality within an empirically plausible framework. (shrink)

Several prominent philosophers believe that moral facts are facts about what reasons we have, and that this entails that moral judgments are necessarily and inherently motivating. According to this argument, if morality cannot move us, then it is hard to understand how it could be sensibly regarded as action-guiding or normative. That is, they endorse a traditional argument for motivational judgment internalism based on moral rationalism. This paper criticizes this argument, and argues instead that there is (...) no necessary or conceptual connection between moral facts and motivation. First, I formulate MJI as the thesis that moral judgments are necessarily and inherently motivating, and introduced several refinements designed to accommodate some plausible exceptions to the initial formulation. I then introduce MR as the thesis that moral facts are identical with or analyzable in terms of facts about requirements of reason. MR is ambiguous between an interpretation that analyzes moral requirements in terms of motivating reasons, and is also subject to various possible refinements, and an interpretation that proceeds in terms of justifying reasons. Finally, I argue that neither interpretation entails any interesting or plausible formulation of MJI. If the argument of this paper are sound, then there is no important connection between moral rationalism and motivational internalism. (shrink)

Recently, Christine Bratu and Mortiz Dittmeyer have argued that Christine Korsgaard’s constitutive project fails to establish the normativity of practical principles because it fails to show why a principle’s being constitutive of a practice shows that one ought to conform to that principle. They argue that in many cases a principle’s being constitutive of a practice has no bearing on whether one ought to conform to it. In this paper I argue that Bratu and Dittmeyer’s argument fails in three important (...) respects. First, they fail to recognize the ways in which Korsgaard’s neo-Kantian view departs from more orthodox Kantian views. Second, they fail to recognize the respect in which Korsgaard’s view is a version of moral rationalism. Third, they overlook an important scope ambiguity in an important premise of their argument. A sensible way of resolving this ambiguity gives the constitutivist a reasonable response. (shrink)

Moral rationalism is identified as the view that moral constraints are rational constraints. This view seems implausible to many because it seems to involve belief in the fantastic-sounding possibility of egoist-conversion: that, in principle, an argument for moral constraints could be produced which would motivate a rational person who does not yet accept those constraints to observe them. Furthermore, the Humean want-belief model of motivation---the view that beliefs alone are incapable of motivating---seems to provide a good (...) explanation for the impossibility of egoist-conversion. I argue that the moral rationalist is not in fact committed to the possibility of egoist-conversion, and that an explanation of its impossibility can be given which is compatible with rationalism; so this impossibility counts neither against rationalism nor for the want-belief model. I consider a number of apparent objections to my position and rebut them. (shrink)

Moral rationalism is identified as the view that moral constraints are rational constraints. This view seems implausible to many because it seems to involve belief in the fantastic-sounding possibility of egoist-conversion: that, in principle, an argument for moral constraints could be produced which would motivate a rational person who does not yet accept those constraints (i.e., an egoist) to observe them. Furthermore, the Humean want-belief model of motivation---the view that beliefs alone are incapable of motivating---seems to (...) provide a good explanation for the impossibility of egoist-conversion. I argue that the moral rationalist is not in fact committed to the possibility of egoist-conversion, and that an explanation of its impossibility can be given which is compatible with rationalism; so this impossibility counts neither against rationalism nor for the want-belief model. I consider a number of apparent objections to my position and rebut them. (shrink)

IN THIS PAPER, I make a presumptive case for moral rationalism: the view that agents can be morally required to do only what they have decisive reason to do, all things considered. And I argue that this view leads us to reject all traditional versions of act‐consequentialism. I begin by explaining how moral rationalism leads us to reject utilitarianism.

With the rapid recent growth of naturalized metaethics, Richard Joyce’s paper sounds an appropriate cautionary note. It’s easy to be overwhelmed by sexy new data and to neglect the difficulties in using the data to draw major philosophical conclusions. One of the central views in the sights of naturalists has been moral rationalism. Jonathan Haidt (2001), Joshua Greene (this volume), Jesse Prinz (forthcoming), and I (2002, 2004b) have all used recent empirical findings to challenge moral rationalist views. (...) Although Joyce is not himself a moral rationalist (see Joyce 2002), he deftly works to beat back our attacks on moral rationalism. Here my goal is to uphold the view that empirical work can challenge moral rationalism in the aftermath of Joyce’s insightful discussion. (shrink)

Evidence suggests that psychopaths’ notoriously immoral behavior is due to affective rather than rational deficits. This evidence could be taken to show that, contrary to moral rationalism, moral norms are not norms of reason. Rationalists could reply either that psychopaths’ behavior is in fact primarily due to rational deficits or that affects are involved in responding to rational norms. Drawing on the work of Antonio Damasio and colleagues, I argue the latter is the better defense of (...) class='Hi'>moral rationalism. (shrink)

This paper takes up an important epistemological challenge to the naturalistic moral realist: that her metaphysical commitments are difficult to square with a plausible rationalist view about the epistemology of morality. The paper begins by clarifying and generalizing this challenge. It then illustrates how the generalized challenge can be answered by a form of naturalistic moral realism that I dub joint-carving moral realism. Both my framing of this challenge and my answer advertise the methodological significance of non-fundamental (...) epistemological theorizing, which defends and deploys epistemological claims without adverting to the most fundamental epistemological facts. (shrink)

Over the last 20 years, a number of central figures in moral philosophy have defended some version of moral rationalism, the idea that morality is based on reason or rationality (e.g., Gewirth 1978, Darwall 1983, Nagel 1970, 1986, Korsgaard 1986, Singer 1995; Smith 1994, 1997). According to rationalism, morality is based on reason or rationality rather than the emotions or cultural idiosyncrasies, and this has seemed to many to be the best way of securing a kind (...) of objectivism about moral claims. Consider the following representative statements. (shrink)

This paper sheds light on Kant’s notion of autonomy in his moral philosophy by considering Kant’s critique of the rationalist theories of morality that Kant discussed in his lectures on practical philosophy from the 1760s to the time of the Groundwork. The paper first explains Kant’s taxonomy of moral theories and his perspective on the history of ethics. Second, it considers Kant's arguments against the two main variants of ‘rationalism’ as he construes it, that is, perfectionism and (...) theological voluntarism, pointing out the similarities to previous criticisms. Third, the paper argues that Kant’s discussion of the 'rationalist' views does not amount to an unqualified dismissal, but to an attempt at working out a novel rationalist position. Kant’s criticisms of rationalist views suggest that his project emerges from the failures of previous rationalism, with the aim to work out a rationalist view that can account for moral obligation by integrating insights from the theological conception. The combination of perfectionism and theological views yields the basic outline of the idea of autonomy, consisting in the lawgiving function of a rational will as a key to the legislation of a necessary law. (shrink)

It is often claimed that the existence of psychopaths undermines moral rationalism. I examine a recent empirically based argument for this claim and conclude that rationalist accounts of moral judgement and moral reasoning are perfectly compatible with the evidence cited.

Over the last twenty years, a number of central figures in moral philosophy have defended some version of moral rationalism, the idea that morality is based on reason or rationality. According to rationalism, morality is based on reason or rationality rather than the emotions or cultural idiosyncrasies, and this has seemed to many to be the best way of securing a kind of objectivism about moral claims. Consider the following representative statements.

This chapter contains section titled: Introduction Philosophical Background Arguments against Moral Rationalism The Moral Sentiments and Sympathy References Further Reading.

This paper considers ethical decision making by blending three streams of related research: cognitive moral development of the decision maker, rational choice theory and a subjective expected utility model. Ethical dilemmas can be defined as situations where moral certainty is compromised by rational cognition. In this paper, the authors assume that some people use a morality-first perspective and others a rationality-first perspective. Ethical scenarios were written and used to test hypotheses derived from this perspective. The instrument developed was (...) shown to be in need of further refinement. Results are discussed in terms of relationships between participant-characteristics variables overall and subscale responses to the ethical scenarios. (shrink)

ABSTRACT: In this paper, I raise the following question: can the ethical thought of Jurgen Habermas and Karl-Otto Apel provide us with a way of showing that morality is a rational requirement? The answer I give is that it cannot. I argue for this claim by showing that a decisive objection to Alan Gewirth’s line of thought in Reason and Morality also applies to discourse ethical arguments that try to show an inescapable commitment to a moral principle. RÉSUMÉ: La (...) pensée ethique de Jurgen Habermas et Karl-Otto Apel peut-elle nous fournir une façon de montrer que la moralité répond à un besoin rationnel? Ma réponse, malheureusement, est que non, elle ne le peut pas. Je défends cet argument en montrant qu’une objection décisive à ce courant de pensée, tel qu’il est présenté par Alan Gerwirth Raison et Moralité, s’applique aussi aux arguments ethiques qui essaient de prouver leur lien incontournable avec un principe moral. (shrink)

One of the most oft-cited parts of Francis Hutcheson’s Illustrations upon the Moral Sense (1728) is his discussion of “exciting reasons.” In this paper I address the question: What is the function of that discussion? In particular, what is its relation to Hutcheson’s attempt to show that the rationalists’ normative thesis ultimately implies, contrary to their moral epistemology, that moral ideas spring from a sense? Despite first appearances, Hutcheson’s discussion of exciting reasons is not part of that (...) attempt. Mainly, it is part of Hutcheson’s comeback to Gilbert Burnet’s objections to Hutcheson’s Inquiry into the Original of Our Ideas of Beauty and Virtue (1725). (shrink)

The standard account of supererogation holds that Liv is not morally required to jump on a grenade, thereby sacrificing her life, to save the lives of five soldiers. Many proponents defend the standard account by appealing to moral rationalism about requirement. These same proponents hold that Bernie is morally permitted to jump on a grenade, thereby sacrificing his life, to spare someone a mild burn. I argue that this position is unstable, at least as moral rationalism (...) is ordinarily defended. The proponent of the standard account of supererogation must either reject moral rationalism or endorse that Bernie is morally required to remain in safety. Along the way, this paper brings together three neglected topics: going *too far* beyond the call of duty, moral rationalism about *permission*, and how to weigh reasons when some reasons have a different proportion of justifying and requiring weight than others. (shrink)

The chapter deals with the two most distinctive elements of the Introduction of the Naturrecht Feyerabend, namely the notions of an end in itself and autonomy. I shall argue that both are to be interpreted with regard to the aim of explaining the ground of right. In this light, I suggest that the notion of an end in itself counters a voluntarist conception like Achenwall’s with a claim whose necessity has a twofold ground: First, the representation of an unconditional worth (...) emerges as a structural element of the practical use of reason. Second, that representation concerns the necessary self-understanding of moral subjects. Finally, I argue that the other distinctive element, the occurrence of the notion of autonomy, is best understood as an application of that idea to a specific issue, which Kant addresses by showing that freedom is a self-regulating domain. (shrink)

Both in historical debates and in recent discussions, the Guise of the Good Thesis represents a genuine dogma of rationalism in moral philosophy. Many influential commentators have maintained that Kant belongs in that camp, even that he “explicitly endorses” the Thesis. Attributing the Thesis to Kant, however, faces scarce textual support and amounts to a dubious understanding of the relationship of Kant’s moral philosophy to previous rationalist views. I suggest that, in Kant’s view, the Thesis only applies (...) to the determination of the will through the moral law. The principle that prior rationalists regarded as descriptive acquires in Kant’s terms a normative status. (shrink)

In the modern debate in metaethics and moral psychology, moral rationalism is often presented as a view that cannot account for the intimate relation between moral behaviour on one hand and feelings, emotions, or desires on the other. Although there is no lack of references to the classic rationalists of the 18th century in the relevant discussions, the works of these writers are rarely ever examined detail. Yet, as the debate in Kant scholarship between “intellectualists” and (...) “affectivists” impressively shows, a more thorough analysis of what the classic rationalists actually have to say about moral motivation is suited to cast serious doubts on the idea that moral rationalism must crucially neglect the affective–conative side of human psychology. The aim of this paper is to analyse the conceptions of moral motivation that were embraced by Kant's rationalist predecessors—Clarke, Wolff, Burnet, Balguy, and Price—which have not attracted a similar amount of attention by specialists so far. The claim I will defend is that none of those early rationalists actually embraces the motivational thesis that is often taken to be characteristic of moral rationalism, a thesis I shall refer to as strong rationalism about (moral) motivation. (shrink)

In the seventeenth and eighteenth centuries rationalism about morality was repeatedly used to reject strong divine command theories of ethics. Such theories were morally unacceptable to many devout Christians. But deism, rationalist through and through, seemed to make revelation unnecessary, and with it most of Christianity. William Law, an influential divine command theorist of Hume's time, argued that Christians must consequently find rationalism unacceptable. Hume's effort to destroy moral rationalism functions to force his readers into a (...) dilemma: either a morally horrifying divine command view of morals, or almost no religion at all. (shrink)

Defenders of Motivational judgment internalism (MJI) argue that in one sense or another, our moral judgments necessarily motivate us to some extent. One of the most prominent defenders is Michael Smith, who in his highly influential book The Moral Problem defends a form of moral rationalism, which is the view that moral reasoning is based on practical reasoning, and thus that moral facts can and are determined a priori. This form of rationalism Smith (...) claims to entail his account about internalism.One of the main merits of Smith’s account of moral motivation is that it allows for individual difference in levels of moral motivation, by making the claim that moral judgments necessarily motivate defeasible. Before elaborating on how Smith does so, I shall first discuss Smith's approach in The Moral Problem, which will also help to set out the basic assumptions that will be taken for granted within this essay. I will then look at the account that he provides, and assess it with respect to one of Russ Shafer-Landau's criticisms thereof. Shafer-Landau rather helpfully puts Smith’s case for his moral rationalism in the form of what he calls ‘the incoherence argument’. The strongest problem that Shafer-Landau has with this argument seems to be with the following claim: ‘it is irrational for an individual to not desire what his fully rational self would desire’. What I hope to conclude is as follows: Although Smith’s account of internalism can for the most part withstand this objection that Shafer-Landau makes to it, even though Smith himself does not demonstrate any incoherence in failing to desire what one’s fully rational self would desire, in that a different kind of incoherence can be defended through other means. This would however result in a requirement for Smith to make significant concessions to his project in The Moral Problem. (shrink)

The chapter provides a brief survey of the moral views of some of the main writers advocating rationalist conceptions in philosophical ethics in Eighteenth-Century Britain and Germany, prior to Reid and Kant: Samuel Clarke, William Wollaston, John Balguy, Richard Price, Christian Wolff (along with his adversary Christian August Crusius), Alexander Gottlieb Baumgarten.

According to rationalism regarding the psychology of moral judgment, people’s moral judgments are generally the result of a process of reasoning that relies on moral principles or rules. By contrast, intuitionist models of moral judgment hold that people generally come to have moral judgments about particular cases on the basis of gut-level, emotion-driven intuition, and do so without reliance on reasoning and hence without reliance on moral principles. In recent years the intuitionist model (...) has been forcefully defended by Jonathan Haidt. One important implication of Haidt’s model is that in giving reasons for their moral judgments people tend to confabulate – the reasons they give in attempting to explain their moral judgments are not really operative in producing those judgments. Moral reason-giving on Haidt’s view is generally a matter of post hoc confabulation. Against Haidt, we argue for a version of rationalism that we call ‘morphological rationalism.’ We label our version ‘morphological’ because according to it, the information contained in moral principles is embodied in the standing structure of a typical individual’s cognitive system, and this morphologically embodied information plays a causal role in the generation of particular moral judgments. The manner in which the principles play this role is via ‘proceduralization’ – such principles operate automatically. In contrast to Haidt’s intuitionism, then, our view does not imply that people’s moral reason-giving practices are matters of confabulation. In defense of our view, we appeal to what we call the ‘nonjarring’ character of the phenomenology of making moral judgments and of giving reasons for those judgments. (shrink)

According to rationalism regarding the psychology of moral judgment, people’s moral judgments are generally the result of a process of reasoning that relies on moral principles or rules. By contrast, intuitionist models of moral judgment hold that people generally come to have moral judgments about particular cases on the basis of gut-level, emotion-driven intuition, and do so without reliance on reasoning and hence without reliance on moral principles. In recent years the intuitionist model (...) has been forcefully defended by Jonathan Haidt. One important implication of Haidt’s model is that in giving reasons for their moral judgments people tend to confabulate – the reasons they give in attempting to explain their moral judgments are not really operative in producing those judgments. Moral reason-giving on Haidt’s view is generally a matter of post hoc confabulation. Against Haidt, we argue for a version of rationalism that we call ‘morphological rationalism.’ We label our version ‘morphological’ because according to it, the information contained in moral principles is embodied in the standing structure of a typical individual’s cognitive system, and this morphologically embodied information plays a causal role in the generation of particular moral judgments. The manner in which the principles play this role is via ‘proceduralization’ – such principles operate automatically. In contrast to Haidt’s intuitionism, then, our view does not imply that people’s moral reason-giving practices are matters of confabulation. In defense of our view, we appeal to what we call the ‘nonjarring’ character of the phenomenology of making moral judgments and of giving reasons for those judgments. (shrink)

This chapter contains sections titled: Introduction Descartes' Ethics Spinoza's Ethics Leibniz's Ethics Conclusion.