AbstractMuch of contemporary metaethics revolves around the issue of “naturalism.” However, there is little agreement on what “naturalism” is or why it should be of significance. In this paper, I aim to rectify this situation by providing a set of necessary conditions on what positions ought to count as “naturalistic.” A metaethical view should count as an instance of naturalism only if it claims that there can be evidence for normative claims that is both public and spatiotemporal. I argue that, unlike other characterizations of “naturalism,” this view shows a clear difference between many metaethical positions and the sciences. The view thereby renders debates about naturalism philosophically significant: the division between naturalists and non‐naturalists is that between philosophers who hold that ethics is relevantly similar to the sciences and those who deny this.
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