Thirty years ago Robert Kaster's Guardians of Language: The Grammarian and Society in Late Antiquity investigated ancient Greco-Roman grammarians as social agents within their social and cultural context. This collection of twelve essays develops that line of inquiry by focusing on one dimension of their activity: how Roman grammarians - as well as scholars and intellectuals more broadly - described, made sense of, and resisted linguistic diversity within the Roman republic and empire. This includes social and diachronic variety within Latin as well as multilingual contact with Greek and...