In <i>Unselfishness</i>, Nicholas Rescher criticizes the stance of many contemporary moral philosophers and social theorists-that rationality conflicts with morality, and instead defends the position of historical thinkers who believed that the worth of altruism is irreducible and that its rationalization does not require recourse to prudential self-interest. To support his position, Rescher provides detailed examples, and a theoretical critique of utilitarian morality.