Donatism was a 4th-century Christian schism centered on the legitimacy of baptisms performed by heretics, originating in North Africa and led by Donatus, a schismatic bishop of Carthage. This movement, which stressed moral integrity and refused fellowship with churches it considered corrupt, ignited extended theological and ecclesiastical disputes.
Saint Augustine of Hippo strongly opposed it, contending that the effectiveness of baptism relied on the unity of the Church, not personal virtue, as reflected in his critiques of Donatist assertions of sole spiritual authority. Scholars such as Philip Schaff and Archibald Robertson placed Donatism within the context of a localized yet significant challenge to Catholic orthodoxy, emphasizing its influence on discussions regarding schism, baptism, and ecclesiastical authority.