Italian Socialist Party of Proletarian Unity

History

The PSIUP was formed on 12 January 1964 by a leftist section of the Italian Socialist Party (PSI). PSIUP had been the PSI's name in 1943–1947. The new PSIUP was led by Tullio Vecchietti. Other leading members were Lelio Basso, Vittorio Foa, Lucio Libertini, Emilio Lussu, Francesco Cacciatore detto Cecchino and Dario Valori. The new party attracted PSI militants who were dissatisfied with the close cooperation between the PSI and the Christian Democracy. Instead, the founders of the PSIUP favoured cooperation with the Italian Communist Party (PCI).

On 13 July 1972, following a disappointing electoral result, the PSIUP split. The majority, led by Libertini, Valori and Vecchietti, joined the PCI. The rightist minority, led by Giuseppe Avolio, Nicola Corretto and Vincenzo Gatto, rejoined the PSI. The leftist minority, led by Foa and Silvano Miniati, continued to work under the name PSIUP, and in December 1972 they established the Proletarian Unity Party (PdUP). A Posadist faction within the PSIUP published the Bollettino della sinistra rivoluzionaria del PSIUP between 1965 and 1967.

The PSIUP included former young left-wing socialists who would later hold important positions in the PCI: Fausto Bertinotti, Alba Sasso, Roberto Speciale, Giacomo Princigalli, Peppino Trulli, Peppino Caldarola, Domenico Ceravolo, Giuseppe Pupillo, On the other hand, Giuliano Amato, Giuseppe Avolio, Nicola Corretto, Vincenzo Gatto, Biagio Marzo, and Emanuele Ceglie joined the PSI.

Electoral results

Italian Parliament

Secretaries

• Tullio Vecchietti (January 1964 – September 1971)
• Dario Valori (October 1971 – July 1972)

References

References

1. (1970). "Political Handbook and Atlas of the World, 1970: Governments and Intergovernmental Organizations as of September 1, 1969, with Supplementary Data Through January 1, 1970". Simon and Schuster.
2. (1970). "Political Handbook and Atlas of the World, 1970: Governments and Intergovernmental Organizations as of September 1, 1969, with Supplementary Data Through January 1, 1970". Simon and Schuster.
3. Valdo Spini. (January-April 1972). "The New Left in Italy". [[Journal of Contemporary History]].
4. Moss, David. (1981). "The kidnapping and murder of Aldo Moro". European Journal of Sociology / Archives Européennes de Sociologie / Europäisches Archiv für Soziologie.