Nevertheless, it is commonly held that posterity has made no mistake in fixing upon the date of the accession of Augustus as a turning-point in the history of the Roman commonwealth. However fully the old forms may have been held to, it is only now that the people in effect submit to a permanent dictator. The office of dictator, as such, had indeed been abolished on the motion of Mark Antony; but the cæsars managed, under cover of old names and with the ostensible observance of old laws, to usurp dictatorial power. There was an actual, even if not a nominal, change of government. This change of government, however, did not coincide with any sudden decline in Roman power. On the contrary, as just intimated, the Roman influence under the early cæsars reached out to its widest influence and attained its maximum importance. Certainly, the epochs which by common consent are known as the golden and the silver ages of Roman literature--the time, that is to say, of Augustus and his immediate successors--cannot well be thought of as periods of great national degeneration. And again the time of the five good emperors has by common consent of the historians been looked on as among the happiest periods of Roman history. In a word the first two centuries of Roman imperial history are by no means to be considered as constituting an epoch of steady decline. That a decline set in after the death of Marcus Aurelius, some causes of which were operative much earlier, is, however, equally little in question. Looking over the whole sweep of later Roman history it seems difficult to avoid the conclusion that the empire was doomed almost from the day of its inception, notwithstanding its early period of power. But when one attempts to point out the elements that were operative as causes of this seemingly predestined overthrow, one enters at once upon dangerous and debatable ground. At the very outset, as already intimated, the prejudices of the historian are enlisted _pro_ or _con_ by the question of the influence of Christianity as a factor in accelerating or retarding the decay of Rome’s greatness.