Rosario Garibaldi Bosco (Palermo, July 28, 1866 – Turin, December 2, 1936) was an Italian Republican-inspired socialist, politician and writer from Sicily.

He married Concetta Seminara and became a political activist in radical and socialist circles inspired by Napoleone Colajanni, known as the father of Sicilian socialism.

[3] After being employed as an accountant at a private company, at the end of 1884 the association moved toward anarchist ideas and the journal changed its name to Proletario (Proletarian) in June 1885.

After a trip to Milan and Paris, he abandoned anarchism while studying the organizational model of the Bourse du travail (French for "labour exchanges"), to import them in Sicily.

In August 1892 he attended the Italian Socialist Party congress at Genoa and on his return obediently purged his fascio of its anarchist and other non-socialist members.

[1] He was also a realist writer, and his play Il giorno di San Sebastiano (Saint Sebastian Day) was the namesake feature film written and directed by Pasquale Scimeca in 1993.

The play is based on the Caltavuturo massacre on January 20, 1893, when during the celebration of Saint Sebastian, a firing squad killed 13 peasants who claimed their right to state-owned land.

[13][14] The play, a monologue depicting a peasant woman whose husband was killed in the events at Caltavuturo, was first performed on February 2, 1893, in Palermo to raise money for the victims.

Enriched with the fashion store run by his partner - in 1912 he had separated from his first wife - and after opening two restaurants in 1925, he was expelled from the list of subversives.