A full-length study of Giambattista Vico's (1668-1744) Diritto Universale. With background in philosophy and political theory, Vaglio places the work in the traditions of Roman legal scholarship and natural law that he was confronting, and extends the treatment of Aristotelian influences on him. She examines his idea that social relationships cannot be founded on the subjective right of the single individual. She also connects the work to his major treatise Scienza Nuova.