Researched by the Ignaria Editorial Team · Published 2026-03-12
Augustine's engagement with the problem of evil was not a detached philosophical exercise — he spent years in Manichaeism, which taught that evil was a coeternal principle opposed to God, before his conversion convinced him otherwise. His decisive answer, developed across the Confessions, Enchiridion, and City of God, was that evil has no independent substance: it is the privation or corruption of good (privatio boni), existing only as good's diminishment. This privation theodicy — the technical term for Augustine's framework — directly answers the Manichaean dualism he had abandoned: if evil is not a substance but an absence, there is no need to posit a coeternal evil principle, and God's sovereignty over creation remains intact. The framework shaped Anselm, Aquinas, and the entire Western theological tradition on how to reconcile God's goodness with the reality of suffering and sin.
What the primary sources show
"These natures, as far as they are natures, are good, when we see that the good things can be thought of without these evil things, while without these good things no nature can be conceived of" — Augustine's direct anti-Manichaean argument: evil is parasitic on good and cannot exist independently, undermining the Manichaean claim of a coeternal evil principle.
"When a thing is corrupted, its corruption is an evil because it is, by just so much, a privation of the good" — Augustine's plain statement of the privatio boni: corruption is real, but it is the diminishment of something good, not an independent substance.