Even given the final truths of what is right and wrong, good and bad, ethics is not complete. For one may yet ask “Why should I be moral?” Of course, we have no prior assurance that it will be possible to provide a non-moral and justifiable answer to the rational and self-interested person. Nevertheless, I claim that reasons for being moral can be provided even for the rational, self-interested, and remorseless individual who knows he will not be caught. In defending (...) my claim I will draw on empirical data from recent social psychology and game theory. Actual human selves are malleable in a number of ways. I will show that it is rational for the self-interested person to modify selves in such a way that moral actions are increasingly preferred. Specifically, I will argue that it is in one’s rational self-interest to enhance empathy in others and future selves in such a way that for increasing numbers other-injury becomes a component of self-injury, and other-benefit becomes a component of self-benefit. This will allow a linkage to be drawn from rational and self-interested action to moral action. The development of this theory will begin by distinguishing my approach from that of Gauthier, then three interpretations of the “Why be moral?” question will be delineated, next the decision theoretic components of my account will be presented, and finally the role of empathy will be considered in detail. (shrink)