Richard Booker Brandt (17 October 1910 – 10 September 1997) was an American philosopher working in the utilitarian tradition in moral philosophy.
Brandt was originally educated at Denison University, a Baptist institution he was shepherded to by his minister father. He received his PhD in Philosophy from Yale University. He taught at Swarthmore College before becoming Chair of the Department of Philosophy the University of Michigan, where he taught with Charles Stevenson and William K. Frankena (1908–1994) and spent the remainder of his career. The expressivist moral philosopher Allan Gibbard has mentioned his great intellectual debt to Brandt.
Brandt wrote Ethical Theory (1959), an influential textbook in the field. He defended a version of rule utilitarianism in "Toward a credible form of utilitarianism" (1963) and performed cultural-anthropological studies in Hopi Ethics (1954). In A Theory of the Good and the Right, Brandt proposed a "reforming definition" of rationality, that one is rational if one's preferences are such that they survive cognitive psychotherapy in terms of all relevant information and logical criticism. He argued also that the morality such rational persons would accept would be a form of utilitarianism.
Brandt believed that moral rules should be considered in sets which he called moral codes. A moral code is justified when it is the optimal code that, if adopted and followed, would maximise the public good more than any alternative code would. The codes may be society-wide standards or special codes for a profession like engineering.