The other heresies--with the exception of the Pelagian--were, in the main, equally fantastic. The Gnostic heresy, with its many subdivisions, was made up of mysticism and magic, and founded upon Zoroastrian notions of dualism, of the two powers of good and evil, light and darkness. To the power of evil it attributed all creation save man, whose soul was accounted of divine substance. The Adamites claimed to be in the state of original innocency of Adam before the fall; they demanded purity in their followers, rejected marriage, which they urged could never have come into existence but for sin, and they expelled from their Church all sinners against their tenets, even as Adam and Eve had been expelled from Eden. The Severists denied the resurrection of the flesh, would not accept the acts of the apostles, and carried purity to fantastic lengths. The Soldiers of Florinus denied the Last Judgment, and held it as an undeniable truth that the resurrection of the flesh lay entirely in reproduction. The Pelagians were the followers of Pelagius, a British monk who settled in Rome towards the year 400, and his heresy at least was founded upon rational grounds. He denied the doctrine of original sin, maintained that every human being was born in a state of innocency, and that his perseverance in virtue depended upon himself. He found numerous followers, and for twenty years the conflict raged between Pelagians and the Church, until Pope Zosimus declared against them and banished Pelagius from Rome. From Constantine onwards Christianity steadily maintains her ascendancy, and her earliest assertion of her power is to bare the sword of persecution, oblivious of the lofty protests against it which she, herself, had uttered, the broad and noble advocacy of tolerance which she had urged in the days of her own affliction. We find Optatus urging the massacre of the Donatists--who claimed that theirs was the true Church--and Constantine threatening with the stake any Jew who should affront a Christian and any Christian who should become a Jew. We find him demolishing the churches of the Arians and Donatists, banishing their priests and forbidding under pain of death the propagation of their doctrines. The power of Christianity suffered one slight check thereafter, under the tolerant rule of Julian the Apostate, who reopened the pagan temples and restored the cult of the old gods; but it rose again to be finally and firmly established under Theodosius in 380.