Abstract

Altruistic self-sacrifice is rare, supererogatory, and not to be expected of any rational agent; but, the possibility of giving up one's life for the common good has played an important role in moral theorizing. For example, Judith Jarvis Thomson (2008) has argued in a recent paper that intuitions about altruistic self-sacrifice suggest that something has gone wrong in philosophical debates over the trolley problem. We begin by showing that her arguments face a series of significant philosophical objections; however, our project is as much constructive as critical. Building on Thomson's philosophical argument, we report the results of a study that was designed to examine commonsense intuitions about altruistic self-sacrifice. We find that a surprisingly high proportion of people judge that they should give up their lives to save a small number of unknown strangers. We also find that the willingness to engage in such altruistic self-sacrifice is predicted by a person's religious commitments. Finally, we show that folk-moral judgments are sensitive to agent-relative reasons in a way that diverges in important ways from Thomson's proposed intuitions about the trolley problem. With this in mind, we close with a discussion of the relative merits of folk intuitions and philosophical intuitions in constructing a viable moral theory.