How ought we evaluate the individual and collective actions on which the existence, numbers and identities of future people depend? In the briefest of terms, this question poses what is addressed here as the problem of contingent future persons, and as such it poses relatively novel challenges for philosophical and theological ethicists. For though it may be counter-intuitive, it seems that those contingent future persons who are actually brought into existence by such actions cannot benefit from or be harmed by these actions in any conventional sense of the terms. This intriguing problem was...