  Wherever the line of precise limits of obligatory beneficence is drawn, the line is likely to be revisionary of ordinary morality. Singer’s proposals, unlike Murphy’s, represent a revision of ordinary morality’s requirements of beneficence. A variety of proposals regarding the limits of beneficence have been made by philosophers, but no agreement exists on even a single general principle. Given this situation, some now doubt that ethical theory and practical deliberation are equipped to establish precise conditions and limits of obligations of beneficence, especially when confronting problems of global poverty.