_The Histories_, as they survive to us, describe in a style that has made them immortal one of the most terrible and crucial moments of Roman history. The deadly struggle for the throne demonstrated finally the real nature of the Principate--based not on constitutional fictions but on armed force--and the supple inefficiency of the senatorial class. The revolt on the Rhine foreshadowed the debacle of the fifth century. Tacitus was peculiarly well qualified to write the history of this period. He had been the eye-witness of some of the most terrible scenes: he was acquainted with all the distinguished survivors: his political experience gave him a statesman's point of view, and his rhetorical training a style which mirrored both the terror of the times and his own emotion. More than any other Roman historian he desired to tell the truth and was not fatally biassed by prejudice. It is wrong to regard Tacitus as an 'embittered rhetorician', an 'enemy of the Empire', a 'detracteur de l'humanite'.[1] He was none of these. As a member of a noble, though not an ancient, family, and as one who had completed the republican _cursus honorum_, his sympathies were naturally senatorial. He regretted that the days were passed when oratory was a real power and the consuls were the twin towers of the world. But he never hoped to see such days again. He realized that monarchy was essential to peace, and that the price of freedom was violence and disorder. He had no illusions about the senate. Fault and misfortune had reduced them to nerveless servility, a luxury of self-abasement. Their meekness would never inherit the earth. Tacitus pours scorn on the philosophic opponents of the Principate, who while refusing to serve the emperor and pretending to hope for the restoration of the republic, could contribute nothing more useful than an ostentatious suicide. His own career, and still more the career of his father-in-law Agricola, showed that even under bad emperors a man could be great without dishonour. Tacitus was no republican in any sense of the word, but rather a monarchist _malgre lui_. There was nothing for it but to pray for good emperors and put up with bad ones.