It has been pointed out that the one hope for the regeneration of Rome under these conditions lay in the possibility of incorporating the various ethnic elements of its wide territories into one harmonious whole. In other words, could Rome in the early day have seen the desirability--as here and there a far-sighted statesman did perhaps see--of granting Roman citizenship to the large-bodied and fertile-minded races of the north, removing thus a prominent barrier to racial intermingling, the result might have been something quite different. We have noted again and again that it is the mixed races that build the great civilisations and crowd forward on the road of human progress. The Roman of the early day had the blood of many races in his veins, but twenty-five or thirty generations of rather close inbreeding had produced a race which eminently needed new blood from without. Yet the whole theory of Roman citizenship set its face against the introduction of this revivifying element. The new blood made itself felt presently, to be sure, and the armies came to be recruited from the provinces. After a time it came to pass that the leaders--the emperors even--were no longer Romans in the old sense of the word. They came from Spain, from Illyricum, and from Asia Minor. Finally the tide of influence swept so strongly in the direction of Illyricum that the seat of Roman influence was transferred to the East, and the Roman Empire entered a new phase of existence. The regeneration was effected, in a measure, by the civilisation of the new Rome in the East; but this was the development of an offspring state rather than the regeneration of the old commonwealth itself. Then in the West the northern barbarians, grown stronger and stronger, came down at last in successive hordes and made themselves masters of Italy, including Rome itself. With their coming and their final conquests the history of old Rome as a world empire terminates. It is the sweep of events of the five hundred years from the accession of Augustus the first emperor to the overthrow of Romulus Augustulus the last emperor that we have to follow in the present volume. Let us consider in a few words the sources that have preserved the record of this most interesting sequence of events. [Illustration] THE SOURCES OF IMPERIAL HISTORY Reference has already been made to the importance of the monumental inscriptions. For the imperial history these assumed proportions not at all matched by the earlier periods. It was customary for the emperors to issue edicts that were widely copied throughout the provinces, and, owing to the relative recency of these inscriptions a great number of them have been preserved.