He graduated in literature and philosophy at the
University of Palermo in 1912, under the guidance of
Giovanni Gentile, with a
thesis on Jesus and the origins of Christianity, published in 1913. In 1914 he married his fellow student Eva Zona, and in 1915 he volunteered as an
artillery officer in the
First World War. In 1919 he began teaching at a high school, and in 1922 he became a professor of
Ancient History at the
University of Catania. In 1923 he moved to the
University of Naples, where he held the chair of
History of Christianity, a matter on which he published several books. He also published various works on the history of the
Risorgimento, defending the theses of
Cavour's liberalism against the critical alterations of the Risorgimento made by monarchist and fascist historians. In 1925 he refrained from signing either Gentile's
Manifesto of the Fascist Intellectuals or
Benedetto Croce’s
Manifesto of the Anti-Fascist Intellectuals, but in 1928 he broke with his old mentor Gentile (due to a dispute over the origin of Christianity and, later, to their opposing views on the
Lateran Treaty) and approached Croce, with whom he had begun a intensive correspondence since 1921. In 1931, as a teacher, he took an
oath of allegiance to Fascism imposed by the regime on penalty of losing his professorship and being excluded from teaching. ==References==