Is Mill right that there is no special threat to utilitarianism here? One might wonder whether utilitarianism makes greater demands on agents than other moral theories. Contemporary writers have argued that utilitarianism seems to be potentially very demanding, much more so than commonsense morality. For instance, reformist utilitarians, such as Peter Singer (1972), have argued that utilitarianism entails extensive duties of mutual aid that would call for significant changes in the lifestyles of