Evolutionary explanations of altruism and human cooperation, first set forth by pioneers such as Darwin, Hamilton and Trivers, suggest that biology might be capable of offering a plausible scientific explanation of the core of human morality. According to this project, morality and human cooperation arise when resourcesare scarce; they cannot be exploited by isolated individuals; and individuals cannot maintain a long-term position of domination over others in order to advance their selfish ends. An important philosophical question that arises with respect (...) to this project has to do with the concepts of de morality and moral motivation that itpresupposes. The evolutionary project has not been clear in this respect. The article argues in favor of two theses: 1) evolutionary explanations of cooperation suggest a contractual type of morality, but they are ambiguous regarding the motivations favored by natural selection, thus reflecting, without resolving it, a traditionaldisagreement between Hobbes’s moral contractualism (selfish motivations) and that of Kant (altruistic motivations); 2) in their current form, these explanations cannot resolve that disagreement, but a reflection on the role of the capacity to interpret the motivations and character of others in the evolution of morality could provide arguments in favor of Kantian contractualism. (shrink)

Hobbes's central insight about ethics was that it should not be understood to require that we make ourselves a prey for others. It is this insight that both varieties of contractarianism [Hobbesian and Kantian] respect. Consider a relationship between two human beings that exists for reasons of either love or duty; let us also suppose that it is a relationship that can be instrumentally valuable to both parties. In order for that relationship to receive our full moral endorsement, we must (...) ask whether either party uses the duty or the love connecting them in a way that affects the other party's ability to realize the instrumental value from that relationship. To be sure, good marriages and good friendships ought not to be centrally concerned with the question of justice, but they must also be, at the very least, relationships in which love or duty are not manipulated by either party in order to use the other party to her detriment. (shrink)