Abstract: This brief Essay examines the relationship between so-called first, second, and third generation rights. It is often thought that second and third generation rights supplement and deepen the commitments to human flourishing that underlie first generation rights. The Essay argues that the generations of rights have rather different conceptual underpinnings and that there may be serious conflicts among particular realizations of first, second, and third generation rights. An optimization strategy of the sort suggested by Robert Alexy, suitably adapted, might provide some ad hoc solutions, but it may be that the generations of rights ultimately are irreconcilable (in the large, though of course not in many particular instances).