Abstract

This paper sets out asking what is to be gained from grounding the pursuit of a cosmopolitan morality in the evolutionary history of our morals, namely, by ascertaining some of the natural constraints under which normative ethical theory must operate. In Section II, I review two major forms of altruism: kin-based and reciprocal altruism. Experimental evidence is cited to support the view that biological altruism involves a carefully self-interested calculation to enhance adaptive fitness to the social environment. In Section III, I explain that, in natural selection, these self-interested calculations about relatedness and reciprocation don’t happen consciously, but rather, almost instantaneously, as heuristics. These heuristics are advantageous to the organism and thus, over time, hardwired to its ‘emotional framework’. Emotional contagion, guilt, envy, and inequity aversion are covered as examples of the emotions at work in altruistic behavior. What can ethical deliberation on cosmopolitan morality adopt from a naturalistic examination of the evolution of altruism? According to situationists, what we do is best explained by inherent tendencies to respond to features of our situation. The pursuit of cosmopolitan morality via the evolutionary history of altruism reiterates this situationist conclusion, and seems to carry a recommendation for polity: to adjust our environment in response to findings about human nature as to better correspond with our proposed moral ends.