Philosopher · Medieval
Peter Abelard
1079–1142 · Early scholasticism (dialectic)
Condemned at Soissons (1121) and Sens (1141), the latter confirmed by Innocent II; reconciled with Bernard and died in communion at Cluny.
The most brilliant dialectician of the twelfth century, Abelard applied logic to theology with unprecedented confidence. His Sic et Non set contradictory patristic texts side by side for resolution, his Ethics located sin in consent rather than the deed, and his conceptualism offered a middle way on universals between Roscelin's nominalism and William of Champeaux's realism.
Why he matters: His method of posing questions and reconciling authorities became the scholastic method itself; his stress on intention transformed moral theology, and his failures mark the limits reason must respect.
Where to be careful
Nineteen propositions were condemned at Sens 1141, including his account of the Trinity (attributing power, wisdom and goodness to the Persons as if by appropriation only), his tendency to reduce the Atonement to moral example, and his claim that no act is sinful in itself apart from consent. His best insights survive in St. Thomas, purified.
Reading
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Ethics (Scito te ipsum)Peter Abelard · Sin as consent; the text that shifted ethics toward intention.
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The Story of My Misfortunes (Historia Calamitatum)Peter Abelard · His own account of his career, Heloise and his condemnation.
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Abelard: A Medieval LifeM. T. Clanchy · The standard biography, fair to Bernard as well.
Documented positions
Where this thinker stands on each question the test asks.