So far as we can learn, however, Erigena's orthodoxy was not at the time suspected, and a few years later he was selected by Hincmar, archbishop of Reims, to defend the doctrine of liberty of will against the extreme predestinarianism of the monk Gottschalk (Gotteschalchus).
He has Augustine's Predestinarianism, stiffened (according to Loofs) by Arab philosophical determinism, and he has much of Augustine's doctrine of the grace of God, though it is flanked with doctrines of human merit which might have astonished Augustine.
When we turn to Duns Scotus, we still find realism, still predestinarianism.
Here, says Ritschl, the involuntary logic of predestinarianism speaks its last word.
We notice in him resolute Predestinarianism - as in Luther, and at first in Melanchthon too; the vehicle of revived Augustinian piety - and resolute depotentiation of sacraments, with their definite reduction to two (admittedly the two chief sacraments) - baptism and the Lord's Supper.