Ronald Dworkin’s unity of value thesis underlies his influential moral, political, and legal thought. This essay presents an interpretation of the unity thesis designed to isolate its distinctly ethical character, elaborate Dworkin’s fundamental ethical arguments for it, and to utilize this reconstruction to correct misinterpretations that, I argue, underlie recent criticism. This criticism largely depends on construing the unity thesis within a familiar dualistic meta-ethical framework according to which Dworkin’s theory of value is classified as either constructivist or realist in (...) character. Both options, however, misapprehend the epistemological framework within which Dworkin defends value judgments in general, and therefore fail to challenge his use of that framework in defending the unity of value in particular. Correcting this oversight is essential to a proper understanding of Dworkin’s novel account of moral epistemology and of the moral and political program that his unity thesis sponsors. The paper concludes by suggesting how more profitable criticism of the unity of value might proceed. (shrink)