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Rh continually poured into the field the rising generations of freemen and soldiers; and their numbers were reinforced by the warlike and populous states of Italy, who, after a brave resistance, had yielded to the valour, and embraced the alliance, of the Romans. The sage historian, who excited the virtue of the younger Scipio and beheld the ruin of Carthage, has accurately described their military system; their levies, arms, exercises, subordination, marches, encampments; and the invincible legion, superior in active strength to the Macedonian phalanx of Philip and Alexander. From these institutions of peace and war, Polybius has deduced the spirit and success of a people incapable of fear and impatient of repose. The ambitious design of conquest, which might have been defeated by the seasonable conspiracy of mankind, was attempted and achieved; and the perpetual violation of justice was maintained by the political virtues of prudence and courage. The arms of the republic, sometimes vanquished in battle, always victorious in war, advanced with rapid steps to the Euphrates, the Danube, the Rhine, and the Ocean; and the images of gold, or silver, or brass, that might serve to represent the nations and their kings, were successively broken by the iron monarchy of Rome.

The rise of a city, which swelled into an empire, may deserve, as a singular prodigy, the reflection of a philosophic mind. But the decline of Rome was the natural and inevitable effect of immoderate greatness. Prosperity ripened the principle of decay; the causes of destruction multiplied with the extent of conquest; and, as soon as time or accident had removed the artificial supports, the stupendous fabric yielded to the pressure of its own weight. The story of its ruin is simple and obvious; and, instead of inquiring why the Roman empire was destroyed, we should rather be surprised that it had subsisted so long. The victorious legions, who, in distant wars, acquired the vices of strangers and mercenaries, first oppressed the freedom of the