CROUSAZ, JEAN PIERRE DE (1663-1748), Swiss writer, was born at Lausanne. In 1700 he became professor of philosophy and mathematics there, and in 1724 theological dis putes about the Consensus (a document drawn up as a test of Protestant orthodoxy as to the doctrine of grace) led to his going to a similar chair at Groningen. In 1726 he went as governor to the young prince Frederick of Hesse-Cassel, and in 1737 was rein stated at Lausanne. He introduced the philosophy of Descartes and Locke to Lausanne, and was a violent opponent of Leibnitz and Bayle.
of his works are Nouvel Essai de logique (1712) ; Geometrie des lignes et des surfaces rectilignes et circulaires (1712) ; Traite du beau (1714) ; Examen du traite de la liberte de penser d'Antoine Collins (1718) ; De l'education des enfants, dedicated to the then Princess of Wales (1722) ; Examen du pyrrhonisme ancien et moderne, an attack chiefly on Bayle
; Examen de l'essai de M. Pope sur l'homme, an attack on the Leibnitzian theory of that poem (1737) ; Logique (1741) ; De l'esprit humain (1741) ; Reflexions sur l'ouvrage intit ule : La Belle W of fienne
