Abstract

In this paper, I argue for two theses. First, if Christianity is true, then morality should depend on the metaphysics of the afterlife. Second, if Christianity is true, then contemporary moral theory is mistaken. The argument for the first thesis rests on two premises. If rightness depends on an act’s effects on an individual, then—at least in part—it depends on the long-term effects on him. If rightness depends—at least in part—on the long-term effects on an individual, then it depends on the metaphysics of the afterlife. The argument for the second thesis rests on how heaven or hell swamp other considerations. By changing assumptions about the nature of heaven or hell, who goes there, and standard mathematics, we end up with different ethical theories. Some of these assumptions conflict with contemporary moral theory regarding killing, letting die, and saving.