Silvio was born in Turin, the son of Eugenio Corio and Chiara Domenica. Following some initial involvement with the Turin Socialist Club, he became active as an anarchist. He trained a printer and typographer. He was conscripted in July 1897 and spent most of the next 18 months in a disciplinary battalion as a result of his political activity. However, in 1898 he fled to France in face of the repression implemented by Luigi Pelloux.
- Heath, Nick. "Corio, Silvio (1875–1954) aka Crastinus, Qualunque". Lib Com. Lib Com. Retrieved 20 September 2015.