The metaphysical dispute between moral realists and antirealists is cast in terms of properties: the realist holds that moral properties exist, the antirealist denies this claim. There is a longstanding philosophical dispute over the nature of properties, and the obscurity of properties may make the realist/antirealist dispute even more obscure. In the spirit of deflationary theories of truth, we can turn to a deflationary theory of properties in order to clarify this issue. One might reasonably worry that such an account (...) of properties would not be capable of properly characterizing disputes regarding the existence or nonexistence of genuine moral properties. In this paper, I will show that, within this framework, the traditional disputes over the existence of moral properties can be characterized in a far clearer fashion than is usually the case. A deflationary account of properties, along with an explanatory hierarchy of properties, makes the dispute in ontology clear. (shrink)

G. E. Moore argues that goodness is an intrinsic non-natural property that supervenes irreducibly on the intrinsic natural properties of its bearers. Accordingly, it is often supposed that “Moorean” supervenience is incompatible with physicalism, a naturalistic thesis. In this paper I argue that Moorean supervenience is not in itself incompatible with physicalism, Moore’s ethical non-naturalism notwithstanding. Understanding why will help us to better appreciate the full range of resources available to physicalists.

This is a paper about the problem of realism in meta-ethics (and, I hope, also in other areas, but that hope is so far pretty speculative). But it is not about the problem of whether realism is true. It is about the problem of what realism is. More specifically, it is about the question of what divides meta-ethical realists from irrealists. I start with a potted history of the Good Old Days.

My aim is to challenge recent attempts at reconciling moral realism and naturalism by pushing ethical naturalists into a dilemma. According to one horn of the dilemma, ethical naturalists must either build unique facts and properties about divergent social structures into their subvenient sets of natural facts and properties, and so jeopardize the objectivity of moral truths, or insist, in the face of all possible worlds in which people have different moral beliefs than ours, that they are all mistaken—this despite (...) the fact that the belief-forming mechanism responsible for their moral beliefs was never concerned with the truth of those beliefs in the first place. This will bring me to suggest that moral properties might only weakly supervene upon natural phenomena. But, according to the other horn of the dilemma, weak supervenience is a defeater for moral knowledge. (shrink)

This is an imagined dialogue between one of the more famous skeptics regarding moral attribution, Thrasymachus, and an imagined Socrates who, through the convenient miracle of time travel, returns to Athens after exposure to contemporary metaethics, now a devoted and formidable quasi-realist expressivist. The dialogue focuses on the characterization of moral conflict and moral justification available to the expressivist, and the authors attempt to lay out the distinctive strengths and weaknesses of the expressivist view.

In On What Matters, Derek Parfit defends a new metaethical theory, which he calls non-realist cognitivism. It claims that normative judgments are beliefs; that some normative beliefs are true; that the normative concepts that are a part of the propositions that are the contents of normative beliefs are irreducible, unanalysable and of their own unique kind; and that neither the natural features of the reality nor any additional normative features of the reality make the relevant normative beliefs true. The aim (...) of this article is to argue that Parfit’s theory is problematic because its defenders have no resources to make sense of the nature of normative truth, which is an essential element of their view. I do this by showing how the traditional theories of truth are not available for the non-realist cognitivists. (shrink)

A prominent objection to supervenience physicalism is that a definition of physicalism in terms of supervenience allows for physicalism to be compatible with nonphysicalist outlooks, such as certain forms of emergentism. I take as my starting point a recent defense of supervenience physicalism from this objection. According to this line of thought, the subvenient base for emergent properties cannot be said to be purely physical; rather, it is “polluted” with emergent features in virtue of necessarily giving rise to them. Thus, (...) if emergentism is true, it is false that everything supervenes on physical properties. I argue that this gives way to a new challenge for supervenience physicalism. The challenge, roughly, is to distinguish the emergentist’s “polluted” base from a physical supervenience base; that is, to give conditions under which the subvenient base is not “polluted” by supervenient properties. The problem, I argue, is that it is hard to see how this can be done without collapsing supervenience physicalism into alternative approaches to physicalism. I thus argue that if the present defense of supervenience physicalism succeeds in defending the adequacy of a supervenience-based definition of physicalism, it does so by compromising its uniqueness. (shrink)

This paper offers a qualified defense of Terry Horgan’s view of brute, inexplicable supervenience theses as physically unacceptable—as having no place in physicalist metaphysics—and his corresponding emphasis on the importance of “superdupervenience”, metaphysical supervenience that can be explained in a “materialistically acceptable” way. I argue, in response to Tom Polger, that it may be possible to ground the physical unacceptability of brute supervenience in its relation physically unacceptable properties supervening on physical properties; moreover, I argue that Horgan’s emphasis on the (...) need for superdupervenience cannot be rejected as unreasonably demanding for the reasons that Polger offers. I furthermore respond to Jessica Wilson’s reasons for thinking that superdupervenience is neither necessary nor sufficient for physical acceptability. Reflection on these topics helps to bring out several issues about the role of supervenience in physicalist metaphysics and ultimately a problem that any supervenience-based approach to physicalism may face. (shrink)

I explore the Because Constraint—the idea that moral facts depend on natural facts and that moral judgements ought to respect the dependence of moral facts on natural facts. I consider several issues concerning its clarification and importance.