The theological doctrine propounded by Pelagius, a British monk, and condemned as heresy by the Roman Catholic Church in AD 416. It denied original sin and affirmed the ability of humans to be righteous by the exercise of free will.
Taylorism, sometimes called the "New Haven" theology, was an attempt to defend Calvinism from Arminian attacks, and the defence itself was accused of Arminianism and Pelagianism by A.
Against Manichaean dualism he had vindicated free will; but as against Pelagianism he taught the bondage of sinful man - a position accepted in the East but never welcome there, and not more than half welcome even in the West.
'(16J5), and the Unum Necessarium (1655), which by its Pelagianism gave great offence.'
It seems not unlikely that Pelagianism had taken root among the Christian communities of Ireland, and it was found necessary to send a bishop to combat the heresy.
It may be added that after the Reformation Arianism was revived in Socinianism, and Pelagianism in Arminianism; but the conception of heresy in Protestantism demands subsequent notice.