Abstract
Research underlines that Theodor Mommsen’s Staatslehere has been subjected to a large critical review, but also that some gray areas remain, the consistency of which has prevented us from a more incisive deepening the relationships between the various ‘actors’ of the Roman governance in the Republican age and the reading of this governance in terms of a ‘mixed government’. Research explores the two aspects, concluding that the reference to mixed government is actually useful for describing the political organization of Rome: however, in the sense that this organization corresponded to a complex of autonomous and competing systems of government, whose dialectic found a point of balance in the ‘civic virtue’. From this perspective, research explores the traces of the Roman mixed government in modernity, analyzing if and how its perception allows us to better define the development of American republicanism.