 In evolutionary biology, morality is sometimes simply equated with fairness (Baumard et al. 2013: 60, 77) or reciprocal altruism (Alexander 1987: 77). But it is also sometimes identified by reference to an evolved capacity to make a certain sort of judgment and perhaps also to signal that one has made it (Hauser 2006). This also makes morality into something very much like a natural kind, that can be identified by reference to causal/historical processes. In that case, a content-based definition of morality isn’t required: certain central features are all that one needs to begin one’s theorizing, since they will be enough to draw attention to certain psychologically and biologically individuated mechanisms, and the study of morality will be a detailed inquiry into the nature and evolutionary history of these mechanisms.