Final answer:
Augustine of Hippo was considered the greatest of early-church scholars and defended theological orthodoxy against heresies.
Step-by-step explanation:
Augustine of Hippo, also known as St. Augustine, was considered the greatest of early-church scholars. He was born in Roman Numidia, studied in Carthage and Milan, and became a bishop of Hippo in present-day Algeria. Augustine defended theological orthodoxy and wrote against heresies such as Donatism and Pelagianism. He also addressed the intersection of Christian and classical learning, emphasizing the importance of faith and salvation over worldly knowledge.