Despite some initial resistance from the University of Turin's Philosophy Department, the dissertation was published by Lattes Editori in 1896 and won the Gautieri Prize.
Martinetti's interest in Indian philosophy was long lasting, including a cycle of lectures held in Milan in 1920, collected and published in 1981.
[1] After returning to Italy, Martinetti worked as a secondary school teacher in Avellino (1899–1900), Correggio (1900–1901), Vigevano (1901–1902), Ivrea (1903–1904), and at the liceo classico statale named after Vittorio Alfieri in Turin (1904–1905).
[4] In 1923, following some very difficult occurrences, such as the March on Rome and Benito Mussolini's rise to power, he refused an honourary fellowship at the prestigious Academy of the Lynx-Eyed (in Italian: Accademia dei Lincei).
[5] In March 1926, Martinetti organised the VI National Philosophy Congress on behalf of the Italian Philosophical Society, aiming for a free expression of ideas despite a difficult political context.
From 1927, Martinetti edited the philosophical journal Rivista di filosofia; however, his name never appeared on the publication due to the controversies surrounding him.
He wanted to continue to participate and foster philosophical thought in Italy in the ways that were still accessible to him, despite his refusal to swear an oath of allegiance to the National Fascist Party.
Marinetti's quiet studies were interrupted by a sudden arrest and imprisonment in Turin in May 1935,[8] being accused by Pitigrilli, an agent of the Organisation for the Vigilance and Repression of Anti-Fascism, of conniving with the anti-fascist group Justice and Freedom (in Italian: Giustizia e Libertà).
Pitigrilli also caused the arrest with the same allegations of several Italian intellectuals, including Giulio Einaudi, Vittorio Foa, Cesare Pavese, and Carlo Levi.
Although the vicar of Spineto had urged not to honour the body of a man who had always been a heretic and atheist in his lifetime, about ten people followed the funeral van to the train station, from where Martinetti's corpse was taken to Turin to be cremated.
In his will, Martinetti left a significant sum of money to the Society for the Protection of Animals (in Italian: Società Protettrice degli Animali).