Augustine's writings against the members of the Donatist church in North Africa contain his mature thought on the nature of the sacraments, the morality of the clergy, and the importance of mercy and charity in maintaining church unity. This volume contains the first new English translations of Augustine's writings against the Donatists in more than 100 years, and in the case of at least one writing there has never been an English translation until now. Augustine's responses to conflicts within the North African church remain surprisingly relevant to contemporary crises in Catholicism.