ALEXANDER SEVERUS: PERSIA.—Alexander Severus (222-235) was a man of pure morals, and sincerely disposed to remedy abuses and to govern well. But the evils were too great for the moderate degree of vigor with which he was endowed. The overthrow of the Parthian kingdom, in 226, created, in the New Persian Monarchy, a formidable enemy to Rome. Alexander did little more than check the advance of Persia. In a war against the Germans, he was slain by his own soldiers.

TO DECIUS (A.D. 249).—The fierce and brutal Maximin, who had excited the soldiers of Alexander Severus to mutiny, reigned from 235 to 238. The Senate roused itself to resist his advance into Italy; and he, and his son with him, were killed in his tent by his soldiers. Gordian (238-244) at least held the frontier against the attacks of the Persians. Philip, an Arabian, probably a Roman colonist, after reigning from 244 to 249, was supplanted by Decius, whom his rebellious Moesian and Pannonian soldiers raised to power.

DECIUS TO CLAUDIUS (A.D. 250-268).—The short reign of Decius was marked by the first general persecution of the Christian Church. During his reign, the Goths (A.D. 250) invaded the empire. They traversed Dacia, and crossed the Danube. They ravaged Moesia, and even made their way into Thrace. Decius was defeated by them in Moesia, and slain. The peril of the empire continually increased. The German tribes on the north, the Goths on the Lower Danube and the Euxine, and Persia in the east, arrayed themselves in hostility.

The reigns of Valerian (253-260) and of his associate and successor, Gallienus (260-268), were marked by continuous disaster. Numerous independent rulers—"the thirty tyrants"—established themselves, generally for a very short time, in different regions. In the East, one kingdom, the capital of which was Palmyra, and which had for a ruler Zenobia, the widow of its founder, lasted for ten years (264-273). The Goths occupied Dacia, and from the Cimmerian Bosphorus sent out their predatory expeditions in all directions, plundering cities, including Athens and Corinth, and carrying off immense booty to their homes south of the Danube. The Persians conquered Armenia, took Valerian prisoner, advanced into Syria, and burned Antioch.

TO DIOCLETIAN (A.D. 284).—It would seem as if the Roman empire was on the verge of dissolution. But a series of vigorous emperors—among them Claudius (268-270) and Aurelian (270-275)—quelled rebellion within its borders, and re-established its boundaries; although Aurelian gave up to the Goths Dacia, which had been of no benefit to the empire. Probus (276-282) was a prudent as well as valiant ruler. Carus (282-283) invaded Persia, captured Seleucia and Ctesiphon, and might, perhaps, have completed the conquest of the country, but for his death. Numerianus (283-284) was the last in the succession of rulers during this period of military control, of which the corruption of the army was the worst result.

II. THE ABSOLUTE MONARCHY (TO A.D. 375).

DIOCLETIAN.—Once more the gigantic and weakened frame of the Roman Empire was invigorated by a change in the character of the chief rulers and in the method of government. Diocletian (284-305), one of a number of energetic emperors who were of Illyrian birth, first stripped the imperial office of its limitations, and converted it into an absolute monarchy. This new system was carried to its completion by Constantine. Diocletian took from the Senate what political jurisdiction was left to it. He abolished the difference between the treasury of the state and the private coffers of the prince. The precedence of Rome was taken away by making other great cities to be seats of government. There were to be two emperors under the title of Augustus, with two Caesars under them; and thus the empire was divided, for administrative purposes, into four parts. Maximian, the second Augustus, was to rule over Italy, Africa, and the islands, with Milan for his residence. Constantius Chlorus had the western provinces, —Spain, Gaul, and Britain. At Nicomedia, Diocletian, a man of imposing presence and of great talents as a statesman, exercised rule for twenty years with efficiency and success. The new system, if it involved the peril of strife among the regents, led to a more vigilant and efficient government in the different provinces, and provided for a peaceful succession to the throne. But the government came to resemble, in the omnipotence of the emperor, in the obsequious homage paid to him, and in the cringing manners of the court, an Oriental despotism. The old heathen religion was considered by conservative Romans to be an essential part of the imperial system, and indispensable to the unity of the empire. It was this view, in connection with other influences, which moved Diocletian, near the close of his reign, in 303, to set on foot a systematic persecution of the Christian Church, by a series of extremely severe and well-contrived measures, through which it was designed to extirpate the new religion. The last great persecution, in the reign of Decius, cruel though it had been, did not approach in severity this final effort to exterminate the disciples of the Christian faith, who had now become very numerous. Terrible sufferings were inflicted, but without avail. In 305 Diocletian, partly on account of a serious illness, formally abdicated, and obliged Maximian to do the same. Civil wars followed, until Constantine, the son of Constantius, gained the supremacy, first as joint ruler with Licinius, who governed in the East, and then, after a bloody struggle which began in A.D. 314, as sole master of the empire (A.D. 323).

CONSTANTINE (A.D. 306-337).—The career of Constantine was stained by acts of cruelty towards members of his own family. In the closing period of his life, he was less just and humane than in earlier days. The change which had taken place in the imperial system was signally manifest in his removal of the seat of government to CONSTANTINOPLE, which was built up by him, and named in his honor. Placed between Europe and Asia, on a tongue of land where it was protected from assault, it was admirably suited for a metropolis. But the change of capital involved dangers for the western portions of the empire, exposed as they were to the assaults of the barbarians. The changes in the government begun by Diocletian were completed by Constantine. The empire was divided, for purposes of government, into four prefectures, each of which was subdivided into dioceses. Constantine established, likewise, different classes of nobles, the type of modern systems of nobility. He organized the army afresh, under the Master of the Horse and Master of the Foot, each, however, commanding, in action, both infantry and cavalry, and each having under him dukes and counts. In short, the system of central and despotic administration, with subordinate rulers, which Diocletian began, was perfected by Constantine. Diocletian, in order to fortify the imperial power against the army, had shared his power with "a cabinet of emperors," which his genius enabled him to control. To prevent the breaking up of the empire through the system of viceroys thus created to preserve it, Constantine separated the civil authority from the military as regards the subordinate rulers, while both functions were united in himself. He still further exalted his throne by giving it even more of an Oriental character, by creating a multitude of officials, who were satellites of the sovereign, and by becoming the secular head and guardian of the Christian Church. The arrangements of his court, with its grades of officials, from the chamberlain downwards, were after the Oriental pattern.

THE DOWNFALL OF HEATHENISM.

PROGRESS OF CHRISTIANITY.—The failure of the grand attempt of Diocletian to exterminate Christianity was an indication of its coming triumph. Its progress had been gradual yet rapid, and, in its earlier stages especially, obscure. Of the labors of most of the apostles we know little. On the approach of the Jewish war (p. 180), the Apostle John, and other Christians with him, had repaired to Asia Minor. There, at Ephesus, this apostle lived until the reign of Trajan, and from that center exerted a wide influence, the traces of which are marked and various. The cities were the principal scenes of early missionary work. They were the "strategic points." In them it was easier for Christian preachers to gain a hearing, and in them they were exempt from the hindrance created by strange dialects. Wherever Christians went, even for purposes of trade or mechanical industry, they carried the seeds of the new doctrine. Even with regard to the churches of Alexandria and Carthage, which became so flourishing, and in the case of the church at Rome itself, we can not say how they were first planted. The exultant terms in which the ecclesiastical writers at the end, and even as early as the middle, of the second century speak of the increasing number of the converts, proves that the Christian cause was fast gaining ground. Its adherents were sometimes of the higher class, but mostly from the ranks of the poor.