Return to Africa

Made Bishop of Hippo; his influence as Bishop

His greatness as a theologian; his vast studies

Contest with Manicheans,--their character and teachings

Controversy with the Donatists,--their peculiarities

Tracts: Unity of the Church and Religious Toleration

Contest with the Pelagians: Pelagius and Celestius

Principles of Pelagianism

Doctrines of Augustine: Grace; Predestination; Sovereignty of God; Servitude of the Will

Results of the Pelagian controversy