The term "Donatist" refers to a member of a Christian sect that emerged in North Africa during the early 4th century. Founded by Donatus Magnus, the movement arose in response to the perceived moral failures of clergy who had renounced their faith during the Diocletian persecution. Donatists believed that the validity of sacraments depended on the moral character of the minister administering them. Donatism emphasized the importance of purity and holiness within the church, leading to a strict separation from those they deemed unworthy. This belief resulted in significant theological disputes with the broader Christian community, particularly with the Catholic Church, which maintained that the sacraments were valid regardless of the minister's personal conduct.