Abstract

Assumptions about what it is to be human are implicit in most philosophical reflections upon ethical and epistemological issues. Although such assumptions are not usually elaborated into a comprehensive theory of human nature, they are nonetheless influential in beliefs about what kinds of problem are worthy of consideration, and in judgments about the adequacy of proposed solutions. Claims to the effect that one should not be swayed by feelings and loyalties in the making of moral decisions, for example, presuppose that human beings are creatures whose nature is amenable to guidance by reason rather than emotion and are creatures capable of living well when they act as impartially as possible. Analogously, claims to the effect that knowledge, to merit that title, should be acquired out of independent cognitive endeavour uncluttered by opinion and hearsay, suggest that human beings are creatures who can come to know their environment through their own unaided efforts. And claims to the effect that knowledge, once acquired, is timelessly and universally true depend upon assumptions about the constancy and uniformity of human nature across historical and cultural boundaries.