Moral rationalism takes human reason and human rationality to be the key elements in an explanation of the nature of morality, moral judgment, and moral knowledge. This volume explores the resources of this rich philosophical tradition. Thirteen original essays, framed by the editors' introduction, critically examine the four core theses of moral rationalism: (i) the psychological thesis that reason is the source of moral judgment, (ii) the metaphysical thesis that moral requirements are constituted by the deliverances of practical reason, (iii) (...) the epistemological thesis that moral requirements are knowable a priori, and (iv) the normative thesis that moral requirements entail valid reasons for action. The five essays in Part I ('Normativity') offer contemporary defences or reconstructions of Kant's attempt to ground the normative thesis, that moral requirements entail valid reasons for action, in the nature of practical reason and practical rationality. The four essays in Part II ('Epistemology & Meaning') consider the viability of claims to a priori moral knowledge. The authors of all four essays are sympathetic to a realist moral metaphysics, and thus forgo the straightforward constructivist road to apriority. The four essays in Part III ('Psychology') each grapple with the implications for rationalism of the role of emotions and unconscious processes in moral judgement and action. Together the essays demonstrate that moral rationalism identifies not a single philosophical position but rather a family of philosophical positions, which resemble traditional rationalism, as exemplified by Kant, to varying degrees. (shrink)

Traditional normative realists are committed to the idea that different individuals manage to pick out on the very same property with terms like ‘morally right’, despite variations in their understanding and use of the term. How is this possible? In this chapter, we sketch a metasemantic account that promises to vindicate traditional normative realism within a broadly rationalist framework. We will first introduce a metasemantic principle that ties reference determination to what is justifiable from the perspective of the conceptually competent (...) subject. This type of metasemantic approach has been andstill is the most influential general model of reference determination. We explain how this metasemantic principle can help vindicate something close to the traditional rationalist claim that normative truths can be known a priori. We will then show how an anti-individualist version of this principle can handle the problem of radical disagreement among competent speakers. Finally, we explain how the principle can help to vindicate the traditional rationalist thesis that moral requirements entail valid reasons for action. (shrink)

Moral rationalism takes human reason and human rationality to be the key elements in an explanation of the nature of morality, moral judgment, and moral knowledge. This volume explores the resources of this rich philosophical tradition. Thirteen original essays, framed by the editors' introduction, critically examine the four core theses of moral rationalism: (i) the psychological thesis that reason is the source of moral judgment, (ii) the metaphysical thesis that moral requirements are constituted by the deliverances of practical reason, (iii) (...) the epistemological thesis that moral requirements are knowable a priori, and (iv) the normative thesis that moral requirements entail valid reasons for action. The five essays in Part I ('Normativity') offer contemporary defences or reconstructions of Kant's attempt to ground the normative thesis, that moral requirements entail valid reasons for action, in the nature of practical reason and practical rationality. The four essays in Part II ('Epistemology & Meaning') consider the viability of claims to a priori moral knowledge. The authors of all four essays are sympathetic to a realist moral metaphysics, and thus forgo the straightforward constructivist road to apriority. The four essays in Part III ('Psychology') each grapple with the implications for rationalism of the role of emotions and unconscious processes in moral judgement and action. Together the essays demonstrate that moral rationalism identifies not a single philosophical position but rather a family of philosophical positions, which resemble traditional rationalism, as exemplified by Kant, to varying degrees. (shrink)