The fateful 1947 swing marked a turning point in the Italian political competition no less than abroad, producing both the passage to opposition of the working class parties against the ascent of Degasperi’s centrism and the parallel growth of communist hegemony within the Left. These events were at the same time cause and effect of great changes inside the socialist galaxy, with the Italian Socialist Party (PSI) taking a course that would soon result in a sharp break with its pre-Fascist tradition and the European social-democrat array, i.e. the creation of a Popular Front with the communists in view of the 1948 polls. Lastly, in that year another political formation that had contributed to the defeat of Fascism from a leftist stand knew its conclusive crisis: the Party of Action (Pd’A) split up, the majority of its leaders joining the socialists. Exploring the moves of Riccardo Lombardi, last secretary of the Pd’A, and Lelio Basso, then socialist secretary, during those stormy events, the A. tries to illuminate certain long-lasting inner features of the Italian Left.
Keywords: Italian Socialist Party (PSI), Party of Action (Pd’A), Riccardo Lombardi, Lelio Basso, Degasperi’s centrism, Popular Front