Anselm of Canterbury

Anselm of Canterbury was an eleventh-century Benedictine, prior of Bec in Normandy and later Archbishop of Canterbury. He is the author of the Proslogion, a short prayer-treatise containing the argument that has come to be called the Ontological Argument: the claim that God, defined as that than which nothing greater can be conceived, must exist, because a God who existed only in the understanding would be inferior to one who also existed in reality.

The argument has had a strange afterlife. It has been refuted, repeatedly, in ways that satisfy almost everyone except the people who understand it best. Kant thought he had killed it. Frege and Russell sharpened the killing. Then Alvin Plantinga reformulated it in modal logic in the nineteen seventies and the question reopened. The argument’s persistence is not because it is widely thought to succeed; it is because nobody can quite specify why it fails in a way that does not also threaten other, less suspicious arguments.

Anselm’s broader theological project was the famous fides quaerens intellectum, faith seeking understanding: not faith looking for proof, but faith looking inward at what it already holds in order to articulate it. The Ontological Argument is meant to be read in that key. It is a meditation by a believer, not an apologetic for a skeptic. That framing matters.