St. Zosimus
Zosimus · 417 – 418
Navigated the Pelagian controversy and upheld the African bishops' condemnation of Pelagius.
Zosimus was of Greek origin and became pope in 417. He initially showed leniency toward Pelagius and Caelestius, whose teachings on grace were under dispute. But the African bishops, led by Augustine, pushed back firmly, and Zosimus eventually confirmed the condemnation of Pelagianism. His pontificate lasted only about a year and a half.
Why He Matters
Zosimus's handling of the Pelagian controversy, though initially hesitant, ended with a clear defense of the necessity of God's grace. The episode also showed the important role that local bishops — especially Augustine — played in shaping the Church's teaching.