I will begin this paper by identifying the problem within the theory of ethics, which contractualism as a moral theory is attempting to address. It is not that of solving the problem of moral motivation like the ‘arch-contractualist’, Thomas Scanlon, often claims, but rather that of describing a class of fundamental moral reasons – contractualist reasons for short. In the second section, I will defend the contractualist idea of how the nature of these moral reasons provides us with sufficient, independent (...) tools to construct the content of public moral principles. The rest of my paper is defensive. It addresses the main challenges set to the contractualist account of moral reasons. In the third section, I will discuss a frequent objection according to which the contractualist reasons are a redundant addition to the space of moral reasons. In the fourth section, I will examine the worry that acting from these reasons would not lead to morally admirable action but rather to vice. In the last section, I will investigate the criticism according to which the normative force of the contractualist reasons is insufficient for rationalising our moral actions in certain difficult circumstances. In this section, we get to the heart of the matter – what the reasons contractualism describes truly are, and how they can explain the generally overriding strength of our moral requirements. I hope to conclude that even after these serious challenges contractualism remains a philosophically viable account of morality's rationalistic appeal. (shrink)

The main aim of this thesis is to defend moral realism. In chapter 1, I argue that moral realism is best understood as the view that moral sentences have truth-value, there are moral properties that make some moral sentences true, and moral properties are not reducible to non- moral properties. Realism is contrasted with non-cognitivism, error-theory and reductionism, which, in brief, deny, and, respectively. In the introductory chapter, it is also argued that there are some prima facie reasons to assume (...) that non-cognitivism and error-theory are erroneous. In chapters 2 and 3, I suggest that the two main forms of reductionism, analytic and synthetic reductionism, are mistaken. In chapter 4, I argue that the considerations in the previous chapters in relation to non-cognitivism, error-theory and reductionism provide support to moral realism. It is also suggested that these considerations make it plausible to hypothesise that moral properties depend on non- moral properties in a way I refer to as ‘the realist formula’. The realist formula confirms moral realism since it implies that moral properties are not reducible to non- moral properties. In chapters 5, 6 and 7, I argue that moral realism, much owing to the realist formula, is able to explain significant meta-ethical issues regarding moral disagreement, moral reason and moral motivation. Among other things, externalism concerning moral motivation is defended. The explanatory value of moral realism in relation to these meta-ethical issues is taken to suggest that this view is preferable to non-cognitivism, error-theory and reductionism. Some of the meta-ethical issues discussed in these chapters, particularly moral disagreement and motivation, have been thought to provide support to non-cognitivism and error-theory. I maintain that since realism, unlike reductionism, is able to counter these arguments, it justifies us in upholding the view that moral sentences have truth-value and the view that there are moral properties. In chapter 8, various objections against realism with regard to the dependence of moral properties on non- moral properties are responded to. In chapter 9, I consider an influential argument to the effect that moral properties are not involved in causal explanations. I maintain that this argument fails and that it therefore is reasonable to assume that moral properties are natural properties. However, the discussions in chapters 8 and 9 also suggest that moral realism might face problems that cannot be thoroughly discussed in this thesis. (shrink)