ref program scholasticism began attempt harmonization part medieval christian thinkers harmonize various authorities tradition reconcile christian theology classical late antiquity philosophy especially aristotle also neoplatonism main figures scholasticism include anselm canterbury father scholasticism peter abelard alexander hales albertus magnus duns scotus william ockham bonaventure thomas aquinas aquinas 's masterwork ''summa theologica'' considered pinnacle scholastic medieval christian philosophy ref name gilsonp ref began aquinas
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