Eline Gerritsen

If our moral beliefs rest on a mistake, as moral error theorists claim, what should we do with them? According to Richard Joyce’s revolutionary moral fictionalism, error theorists should pretend to believe moral propositions in order to keep the benefits moral thinking has for their preference satisfaction. This, he claims, frees error theory from radical practical implications. In response, I argue that implementing fictionalism would not preserve our moral practices, but disrupt them. The change from moral belief to make-belief yields an unintended second revolution: a revolution in the content of morality. I show that fictionalism necessarily relies on a similar justification of moral practices as David Gauthier’s contractarianism, and consequently has similar implications for moral content. Because fictionalists engage in moral thinking purely for its instrumental value, they should only accept moral obligations that are useful to them into their fiction. This restriction is important: the most useful moral fiction departs substantially from conventional moral views. Revolutionary moral fictionalism is therefore more radical than it is promised to be.

We are subject to many different norms telling us how to act, from moral norms to etiquette rules and the law. While some norms may simply be ignored, we live under the impression that others matter for what we ought to do. How can we make sense of this normative authority some norms have? Does it fit into our naturalist worldview? Many philosophers claim it does not. Normativity is conceived to be distinct from ordinary natural properties, making it mysterious. The mystery fuels a radical yet prominent scepticism about the existence of normative properties: if they are too strange to actually exist, there is nothing we ought to do. Some take this to mean, moreover, that nothing is morally right or wrong. We must critically examine the ideas behind these theories, which put both morality and normativity in general on the line. The aim of this thesis is to unravel the mystery of normativity. It uncovers and objects to the influential non-natural conception of it, arguing that we can capture normativity with natural properties. In particular, it explores how the authority of norms can be explained by the commitments of the people subject to them. In connection to this, it challenges the conceptual claim behind the view that all moral judgements are mistaken. Finally, it reveals that treating morality as a mere fiction has revolutionary practical implications. This emphasises the importance of the overall conclusion: we need not conceive of either moral or normative properties as too mysterious to exist.