Donatism was a Christian sect leading to a schism in the Church, in the region of the Church of Carthage, from the fourth to the sixth centuries. Donatists argued that Christian clergy must be faultless for their ministry to be effective and their prayers and sacraments to be valid. Donatism had its roots in the long-established Christian community of the Roman province Africa Proconsularis (present-day Tunisia, the northeast of Algeria, and the western coast of Libya) and Mauretania Tingitana (roughly with the northern part of present-day Morocco), in the persecutions of Christians under Diocletian. Named after the Berber Christian bishop Donatus Magnus, Donatism flourished during the fourth and fifth centuries. Donatism mainly spread among the indigenous Berber population, and Donatists were able to blend Christianity with many of the Berber local customs.
The Roman governor of North Africa, lenient to the large Christian minority under his rule throughout the Diocletianic Persecutions, was satisfied when Christians handed over their scriptures as a token repudiation of faith. When the persecution ended, Christians who did so were called traditores—"those who handed (the holy things) over"—by their critics (who were mainly from the poorer classes).
Like third-century Novatianism, the Donatists were rigorists; the church must be a church of "saints" (not "sinners"), and sacraments administered by traditores were invalid. In 311 Caecilian (a new bishop of Carthage) was consecrated by Felix of Aptungi, an alleged traditor. His opponents consecrated Majorinus, a short-lived rival who was succeeded by Donatus.
Two years later, a commission appointed by Pope Miltiades condemned the Donatists. They persisted, seeing themselves as the true Church with valid sacraments. Because of their association with the Circumcellions, the Donatists were repressed by Roman authorities. Although they had local support, their opponents were supported by Rome and by the rest of the Catholic Church.