The period of two hundred and eleven years, between the accession of Augustus and the death of Marcus Aurelius, is known as the Early Empire. As we shall now learn, it was a time of settled government and of internal tranquillity. Except for a brief period of anarchy at the close of the reign of Nero, it was also a time of regular succession to the throne. Nearly all the emperors were vigorous and capable rulers. The peace and prosperity which they gave to the Roman world amply justify--if justification be needed--the change from republic to empire. THE NEW RULER Few persons have set their stamp more indelibly on the pages of history than Octavian, whom we may now call by his more familiar name _Augustus_ ("Majestic"). Augustus was no military genius to dazzle the world with his achievements. He was a cool and passionless statesman who took advantage of a memorable opportunity to remake the Roman state, and who succeeded in the attempt. Absolute power, which destroys weaker men, with Augustus brought out the nobler elements of character. From the successful leader of a party he became the wise and impartial ruler of an empire. THE NEW GOVERNMENT Augustus had almost unlimited power. His position was that of a king, as supreme as Julius Caesar had ever been. Better, however, than Julius Caesar, Augustus realized that an undisguised autocracy would only alienate public opinion and invite fresh plots and rebellions, Augustus intended to be the real master, but he would also be careful to conceal his authority under republican forms. The emperor was neither king, dictator, nor triumvir. He called himself a republican magistrate-- _Princeps_ [2]--the "First Citizen" of the state. POWERS ENJOYED BY AUGUSTUS Augustus gave up the externals, only to keep the essentials, of royalty. He held the proconsular authority, which extended over the frontier provinces and their legions. He held the tribunician authority, which made his person sacred. As perpetual tribune he could preside over the popular assemblies, manage the Senate and change its membership at pleasure, and veto the acts of almost any magistrate. In the provinces and at home in the capital city the emperor was supreme. THE EMPIRE UNDER AUGUSTUS Augustus ruled a vast realm. In it all the dreams of world dominion which Alexander had cherished were more than realized. The empire included nearly the entire circle of the Mediterranean lands. On the west and south it found natural barriers in the Atlantic Ocean and the African desert. On the east the Euphrates River had formed, since the defeat of Crassus, [3] the dividing line between Rome and Parthia. The northern frontier, beyond which lay the Germanic barbarians, required, however, additional conquests for its protection. [Illustration: Map, THE EXPANSION OF ROMAN DOMINIONS 31 B.C.-180 A.D.] THE DANUBE BOUNDARY