Born in Mantovano, Rizzi joined the Italian Socialist Party in 1918 but among others, left in 1921 to be among the founders of the Communist Party of Italy. In 1930, he left the Party and adopted positions close to those of Leon Trotsky, becoming one of main the critics of Stalin and his politics. Rizzi emigrated to France, and his most important work, Bueaucratisation of the World, was published in Paris in 1939. It would be more than 30 years before this work would be published in Italy. Rizzi returned to Italy in the 1943 but withdrew to private life contributing irregularly to “Critica Sociale,” “Tempi Moderni” and “Rassegna di Sociologia.