Whence it is easy to understand how terrible must have been the struggle between the two principles so antagonistic, from the time when in the Empire, immeasurable and complicated, the institutions of the Republic proved inadequate to govern so many diverse peoples and territories so vast. The Romans kept on, as at first, rebelling at the idea of placing a man-god at the head of the State, themselves to become, when finally masters of the world, the slaves of a dynasty. The conflict between the two principles lasted a century, from Cæsar to Nero, filled the story of Rome with hideous tragedies, but ended with the truce of a glorious compromise; for Rome succeeded in putting into the monarchic constitution of empire some essentially republican ideas, among others, the idea of the indivisibility of the State. Not only Augustus and his family, but also the Flavians and the Antonines, never thought that the Empire belonged to them, that they might dispose of it like private property; on the contrary, they regarded it as an eternal and indivisible holding of the Roman people which they, as representatives of the _populus_, were charged to administer. It is therefore easy, as I have said, to explain how, as never before, the history of Rome was looked upon as a great war between the monarchy and the republic. Indeed, the problem of the republic and the monarchy, always present to the minds of writers of the nineteenth century, has been perhaps the chief reason for the gravest mistakes committed by Roman historiography during this period--mistakes I have sought to correct. For example, the republicans have pinned their faith to all the absurd tales told by Suetonius and Tacitus about the family of the Cæsars, through preconceived hate for the monarchy; and the monarchists have exaggerated out of measure the felicity of the first two centuries of the Empire, to prove that the provinces lived happy under the monarchic administration as never before or after. Mommsen has fashioned an impossible Cæsar, almost making of that great demagogue a literary anticipation of Bismarck.