"What implications do recent empirical findings from the fields of biology, primatology, anthropology, psychology and history have for metaethical theories about moral objectivity? I defend the thesis that these findings detract from the plausibility of a realist account of moral objectivity but leave room for a more moderate, antirealist account of objectivity, framed in terms of stance-invariance. The dissertation consists of six articles written for publication in academic journals. In these articles I present two novel, empirically informed challenges to moral realism, and point out some shortcomings of existing challenges. One of the novel challenges builds on the second horn of Sharon Street’s ‘Darwinian Dilemma’, according to which moral realists are committed to an implausible evolutionary hypothesis, and extends this criticism to the historical realm. The other novel challenge is fuelled by theoretical and experimental work in moral psychology, and takes issue with the presumed advantages of moral realism in explaining the qualities of our moral experience. Apart from criticizing moral realism, I also develop and defend an alternative account of moral objectivity in antirealist terms and argue that it is as least as successful as a realist account in capturing the objectivist commitments of ordinary moral discourse."-- Page 14.