This paper addresses the rights-ascription problem—the problem of determining what properties or characteristics one must have to qualify for fundamental rights. As argued here, one traditional response to this problem—the “humanity standard”—fails because rather than recognizing the problem as one of moral predication regarding actual individuals, it accepts nominal membership in a vaguely defined class (e.g., “humanity”) as adequate grounds for ascribing these rights. This failure encourages the hypothesis pursued here, viz., that qualifying for fundamental rights is a matter of (...) whether, given their specific nature, certain individuals (whether human or not) can benefit from the distinctive normative benefits of the fundamental rights ascribed to them. The paper uses a significantly modified rendition of Feinberg’s analysis to argue that only individuals who have or are capable of having certain interests, those that are for their own sake as is their due, qualify to make fundamental rights-claims. Of paramount importance here is the relationship between having such interests and having a “transitive due”; i.e. the psychological capacity to benefit from the moral respect and deference afforded oneself by others when asserting or exercising one’s fundamental rights. (shrink)