The long course of studies resulted in his teaching philosophy for the space of eleven years, from 1837 until the Revolution of 1848 drove him to Malta. Liberatore"s chief claim to fame was to have brought about the revival of the scholastic philosophy of Aquinas, publishing his own course of philosophy in 1840.
On returning to Italy he was appointed to teach theology, but gave up his professorship to found and assume charge in 1850 of the Civiltà Cattolica, a periodical founded by the Jesuits to defend the cause of the Church and the papacy, and to spread the knowledge of the doctrine of Thomas Aquinas. He attacked Rationalism, Ontologism, and Rosminianism.
This movement he promoted in the class-room, by textbooks on philosophy, by articles in the "Civiltà Cattolica" and other periodicals, by larger and more extensive works, and also by his work as member of the Accademia Romana by appointment of Leo XIII.
