Evolutionary debunkers of morality hold this thesis: If S’s moral belief that P can be given an evolutionary explanation, then S’s moral belief that P is not knowledge. In this paper, I debunk a variety of arguments for this thesis. I first sketch a possible evolutionary explanation for some human moral beliefs. Next, I explain how, given a reliabilist approach to warrant, my account implies that humans possess moral knowledge. Finally, I examine the debunking arguments of Michael Ruse, Sharon Street, (...) and Richard Joyce. I draw on the account of moral knowledge sketched earlier to illustrate how these arguments fail. -/- . (shrink)

I argue that William Craig’s defence of the moral argument is internally inconsistent. In the course of defending the moral argument, Craig criticizes non-theistic moral realism on the grounds that it posits the existence of certain logically necessary connections but fails to provide an adequate account of why such connections hold. Another component of Craig’s defence of the moral argument is an endorsement of a particular version of the divine command theory. Craig’s version of DCT posits certain logically necessary connections (...) but Craig fails to provide an adequate account of why these connections hold. Thus, Craig’s critique of non-theistic moral realism is at odds with his DCT. Since the critique and DCT are both essential elements of his defence of the moral argument, that defence is internally inconsistent. (shrink)

Eric Wielenberg and I agree that basic moral truths are necessarily true. But Wielenberg thinks that, because these truths are necessary, they require no explanation, and I do not: some basic moral truths are not self-explanatory. I argue that Wielenberg’s reasons for thinking that my justification of that claim is inadequate are ultimately unconvincing.

William Irwin defends a form of moral anti-realism, according to which there are no objective moral facts. He contends that moral realism is objectionable because of its being more complex or not as simple as anti-realism; moral realism is in conflict with science; moral realism is also challenged by the fact that our moral judgements would differ if we were subject to a different biology or evolutionary past. Irwin also argues that insofar as moral realism is supportable evidentially by experience (...) this would lead to the absurdity of thinking theism may be supported evidentially by religious experience. In response, it is argued that there are many truths and practices that are not intelligible if there are no objective, normative truths and that objective moral truths are no more dispensable or odd than epistemic norms. It is further argued that Irwin's account of the evolution of morality is not able to escape presupposing objective moral facts. Finally, the appeal to moral and religious experience is defended in making the case for moral realism and theism. (shrink)

While the existence of horrendous evils has generally been taken to be evidence against the existence of God, some philosophers have suggested that it may be evidence for the existence of God. This paper introduces three main kinds of theistic arguments from horrendous evils: the argument from objectively horrifying evils, the pragmatic argument from evil, and an argument from reasonable responses. For each of these arguments, I will first reconstruct a standard version of the argument, before suggesting ways the argument (...) may be challenged, or further developed. (shrink)

This paper aims to neutralize Draper-style evidential arguments from evil by defending five theses: (1) that, when those who advance these arguments use the word “evil,” they are referring, at least in large part, to ill-being; (2) that well-being and ill-being come as a pair (i.e., are essentially related); (3) that well-being and ill-being are best understood in an at least partly objectivist way; (4) that (even partial) objectivism about well-being and ill-being is best understood as implying non-naturalism about well-being (...) and ill-being; and (5) that the truth of non-naturalism about well-being and ill-being does not fit cleanly with naturalism and, in fact, fits at least as well with theism as it does with naturalism. (shrink)

The relationship between God and morality has been a topic of philosophical discussion since Socrates engaged Euthyphro in the agora. In recent years, it has received a lot of attention, as theistic philosophers have attempted to show that divine command theory and other theistic meta‐ethical accounts are defensible. Whether metaphysical naturalism is compatible with moral realism is a related (and equally controversial) topic. This essay surveys the main issues in these debates.

It is a common idea that morality, or moral truths, if there are any, must have some sort of source, or grounding. It has also been claimed that constructivist theories in metaethics have an advantage over realist theories in that the former but not the latter can provide such a grounding. This paper has two goals. First, it attempts to show that constructivism does not in fact provide a complete grounding for morality, and so is on a par with realism (...) in this respect. Second, it explains why it seems that morality in fact couldn't have a source. (shrink)

The question of the meaning of life has long been thought to be closely intertwined with that of the existence of God. I offer a new theistic, anti-naturalist argument from the meaning of life. It is argued that the desire for life is irrational on naturalism, since there would be no good reason to believe that life is worthwhile on the whole if naturalism were true. As I show, the same cannot be argued of theism. Since it is clear that (...) the desire for life is not irrational, it is concluded that we have strong reason to prefer theism over naturalism. (shrink)

Theistic metaethics usually places one key restriction on the explanation of moral facts, namely: every moral fact must ultimately be explained by some fact about God. But the widely held belief that moral truths are necessary truths seems to undermine this claim. If a moral truth is necessary, then it seems like it neither needs nor has an explanation. Or so the objection typically goes. Recently, two proponents of theistic metaethics — William Lane Craig and Mark Murphy — have argued (...) that this objection is flawed. They claim that even if a truth is necessary, it does not follow that it neither needs nor has an explanation. In this article, I challenge Craig and Murphy’s reasoning on three main grounds. First, I argue that the counterexamples they use to undermine the necessary truth objection to theistic metaethics are flawed. While they may provide some support for the notion that necessary truths can be explained, they do not provide support for the notion that necessary moral truths can be explained. Second, I argue that the principles of explanation that Murphy and Craig use to support theistic metaethics are either question-begging (in the case of Murphy) or improperly motivated (in the case of Craig). And third, I provide a general defence of the claim that necessary moral truths neither need nor have an explanation. (shrink)

Moral realists often disagree about the nature of moral properties. These properties can be natural (as per naturalistic moral realism) or non-natural. But it is unclear how we should understand the notion of naturalness employed in these discussions. In this paper I propose a novel account of moral naturalness. I suggest that a property F is natural iff F falls within the scope of a natural law. In turn, a law is natural when it figures in a nomic nexus involving (...) the laws of physics. (shrink)

Why is there something rather than nothing? Apparently many people regard that question as a challenge to naturalism because they think it’s too fundamental or too sweeping for natural science to answer, even in principle. I argue, on the contrary, that the question has a simple and adequate naturalistic answer: ‘Because there are penguins.’ I then diagnose various confusions underlying the suspicion that the question can’t have such an answer and, more generally, that the question, or else some variant of (...) it, can’t have a naturalistic answer at all. (shrink)

There is a connection between moral facts and personal identity facts: morality grounds personal identity. If, for example, old Sally enters a teletransporter, and new Sally emerges, the fundamental question to ask is: is new Sally morally responsible for actions (and omissions) of old Sally? If the moral facts are such that she is morally responsible, then Sally persisted through the teletransporter event, and if not, Sally ceased to exist.