[Sidenote: Character of his later wars.]
But Roman territories were not much enlarged by Caesar after the conquest of Celtic Europe. His later wars were either against rivals or to settle distracted provinces. Nor were they increased in the civil wars which succeeded his death, between the various aspirants for the imperial power and those who made one more stand for the old constitution. At the fatal battle of Philippi, when the hopes of Roman patriots vanished forever, double the number of soldiers were engaged on both sides than at Pharsalia, but fortune had left the senatorial party, of which Brutus was the avenger and the victim.
[Sidenote: Civil wars after the death of Caesar.]
[Sidenote: Ascendency of Octavian.]
Civil war was carried on most vigorously after the death of Julius. But it was now plainly a matter between rival generals and statesmen for supreme command. The chief contest was between Octavian and Antony, the former young, artful, self-controlled, and with transcendent abilities as a statesman; the latter bold, impetuous, luxurious, and the ablest of all Caesar's lieutenants as a general. Had he not yielded to the fascinations of Cleopatra, he would probably have been the master of the world. But the sea-fight of Actium, one of the great decisive battles of history, gave the empire of the world to Octavian B.C. 31, and two years after the victor celebrated three magnificent triumphs, after the example of his uncle, for Dalmatia, Actium, and Egypt. The kingdom of the Ptolemies passed under the rule of Caesar. The Temple of Janus was shut, for the first time for more than two hundred years; and the imperial power was peaceably established over the civilized world.
[Sidenote: Necessity for the empire.]
The friends of liberty may justly mourn over the fall of republican Rome, and the centralization of all power in the hands of Augustus. But it was a calamity which could not be averted, and was a revolution which was in accordance with the necessities of the times. Fifty years' civil war taught the Romans the hopelessness of the struggle to maintain their old institutions so long as the people were corrupt, and fortunate generals would sacrifice the public welfare to their ambition. Order was better than anarchy, even though a despot reigned supreme. When men are worse than governments, they must submit to the despotism of tyrants. It is idle to dream of liberty with a substratum of folly and vice. The strongest man will rule, but whether he rule wisely or unwisely, there is no remedy. Providence gave the world to the Romans, after continual and protracted wars for seven hundred years; and when the people who had conquered the world by their energy, prudence, and perseverance, were no longer capable of governing themselves, then the state fell into the possession of a single man.
[Sidenote: Change in the imperial policy.]
Under the emperors, the whole policy of the government was changed. They no longer thought of further aggrandizement, but of retaining the conquests which were already made. And if they occasionally embarked in new wars, those wars were of necessity rather than of ambition, were defensive rather than aggressive. New provinces were from time to time added, but in consequence of wars which were waged in defense of the empire. The conquest of Britain and Judea was completed, and various conflicts took place with the Germanic nations, who, in the reign of Antoninus, formed a general union for the invasion of the Roman world. These barbarians were the future aggressors on the peace of the empire, until it fell into their hands. The empire of Augustus may be said to have reached the utmost limits it ever permanently retained, extending from the Rhine and the Danube to the Euphrates and Mount Atlas, embracing a population variously estimated from one hundred to one hundred and thirty millions.
[Sidenote: Perfection of military art.]