Traditionalism A philosophical system which makes tradition the supreme criterion and rule of certitude. Exposition According to traditionalism, human reason is of itself radically unable to know with certainty any truth or, at least, the fundamental truths of the metaphysical, moral, and religious order. Hence our first act of knowledge must be an act of faith, based on the authority of revelation. This revelation is transmitted to us through society, and its truth is guaranteed by tradition or the general consent of mankind. Such is the philosophical system maintained chiefly, in its absolute form, by the Vicomte de Bonald and F. de Lamennais in their respective works and, with some mitigation, by Bautain, Bonetty, Ventura, Ubaghs, and the school of Louvain. According to de Bonald, man is essentially a social being. His development comes through society; and the continuity and progress of society have their principle in tradition. Now language is the instrument of sociability, and speech is as natural to man as is his social nature itself. Language could not have been discovered by man, for "man needs signs or words in order to think as well as in order to speak"; that is "man thinks his verbal expression before he verbally expresses his thought"; but originally language, in its fundamental elements together with the thoughts which it expresses, was given him by God His Creator (cf.