 Unsurprisingly, moral realists who take a genealogical perspective see things differently than the debunkers (Huemer 2016). Many philosophers have been attracted to the idea that human cultures are in the midst of a significant historical trend in the direction of moral progress, as the last several centuries have witnessed a putative triumph of the open society, a proliferation of broadly inclusive norms and values across the globe (Jamieson 2002; Singer 1981 [2011]; Buchanan &amp; Powell 2018; Gaus 2021; also see Pinker 2011, 2018). This wide and relatively rapid spread of inclusivity is difficult for evolutionarily-inspired moral skeptics and anti-realists to account for, the realist argues, because the extension of moral concern beyond members of a cultural ingroup seems to be maladaptive from an evolutionary perspective. Thus, realism seems better able to account for the trend, explaining why inclusivist norms and values spread so quickly, and of why it only happened so recently.