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St. Anselm of Canterbury (born 1033/34, Aosta, Lombardy [Italy]—died April 21, 1109, possibly at Canterbury, Kent, England; feast day April 21) was an Italian-born theologian and philosopher, known as the father of Scholasticism, a philosophical school of thought that dominated the Middle Ages. He was recognized in modern times as the originator of the ontological argument for the existence of God (based on the idea of an absolutely perfect being, the fact of the idea...