It was towards the close of his life in 43 B.c. that Cicero wrote the three books of the de Officiis. The attractions of a philosophical treatise whose theme is moral duty are likely to appear slight to the modern reader, especially if that reader thinks its author to be merely the purveyor of second-hand ideas borrowed from Greek sources. Yet the de Officiis epitomizes, in an intensely Roman way, the political beliefs and ideals of the Senatorial order at Rome as the Republic finally succumbed to autocracy. The political philosophy of the ancients may be more immediately relevant today than their ethical speculation, for, while it is folly to interpret political activity as if the Roman Republic enjoyed a two-party system composed of left-wing populates and right-wing optimates, it is true that much of the turmoil generated during the last century of the Republic was related to proposals for agrarian reform and the redistribution of land; similarly, much of the debate currently being conducted between supporters of the rival ideologies is centred about the ownership of property and assets. Perhaps we may be encouraged to survey the de Officiis more sympathetically if we approach it as political scientists and as students of this subject mindful of the writings of another ancient, the historian Thucydides, and his opinion that, human nature being a constant, situations will repeat themselves in the same or a very similar form.