de Bell. Jugurthin. c. 4. Such were the generous professions of P. Scipio and Q. Maximus. The Latin historian had read and most probably transcribes, Polybius, their contemporary and friend.]
4000 (return) [ While Carthage was in flames, Scipio repeated two lines of the Iliad, which express the destruction of Troy, acknowledging to Polybius, his friend and preceptor, (Polyb. in Excerpt. de Virtut. et Vit. tom. ii. p. 1455-1465,) that while he recollected the vicissitudes of human affairs, he inwardly applied them to the future calamities of Rome, (Appian. in Libycis, p. 136, edit. Toll.)]
5000 (return) [ See Daniel, ii. 31-40. “And the fourth kingdom shall be strong as iron; forasmuch as iron breaketh in pieces and subdueth all things.” The remainder of the prophecy (the mixture of iron and clay) was accomplished, according to St. Jerom, in his own time. Sicut enim in principio nihil Romano Imperio fortius et durius, ita in fine rerum nihil imbecillius; quum et in bellis civilibus et adversus diversas nationes, aliarum gentium barbararum auxilio indigemus, (Opera, tom. v. p. 572.)]
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 republic, and afterwards violated the majesty of the purple. The emperors, anxious for their personal safety and the public peace, were reduced to the base expedient of corrupting the discipline which rendered them alike formidable to their sovereign and to the enemy; the vigor of the military government was relaxed, and finally dissolved, by the partial institutions of Constantine; and the Roman world was overwhelmed by a deluge of Barbarians.
The decay of Rome has been frequently ascribed to the translation of the seat of empire; but this History has already shown, that the powers of government were divided, rather than removed. The throne of Constantinople was erected in the East; while the West was still possessed by a series of emperors who held their residence in Italy, and claimed their equal inheritance of the legions and provinces. This dangerous novelty impaired the strength, and fomented the vices, of a double reign: the instruments of an oppressive and arbitrary system were multiplied; and a vain emulation of luxury, not of merit, was introduced and supported between the degenerate successors of Theodosius. Extreme distress, which unites the virtue of a free people, imbitters the factions of a declining monarchy. The hostile favorites of Arcadius and Honorius betrayed the republic to its common enemies; and the Byzantine court beheld with indifference, perhaps with pleasure, the disgrace of Rome, the misfortunes of Italy, and the loss of the West. Under the succeeding reigns, the alliance of the two empires was restored; but the aid of the Oriental Romans was tardy, doubtful, and ineffectual; and the national schism of the Greeks and Latins was enlarged by the perpetual difference of language and manners, of interests, and even of religion. Yet the salutary event approved in some measure the judgment of Constantine. During a long period of decay, his impregnable city repelled the victorious armies of Barbarians, protected the wealth of Asia, and commanded, both in peace and war, the important straits which connect the Euxine and Mediterranean Seas. The foundation of Constantinople more essentially contributed to the preservation of the East, than to the ruin of the West.