De Officiis (On Duties) is Cicero's last theoretical work and contains his analysis, in a Greek theoretical framework, of the political and ethical values of the Roman governing class in the late Republic. It has often been treated merely as a key to the Greek philosophical works that Cicero used, but this volume aims to render De Officiis, which had a profound impact upon subsequent political thinkers, more intelligible by explaining its relation to its own time and place. All the standard series features are present, including a wholly new translation, a concise introduction by a leading scholar, select bibliography, chronology, notes on vocabulary and brief biographies of the most prominent individuals mentioned in the text.