The Unified Socialist Party ( it, Partito Socialista Unificato), officially called Unified PSI–PSDI (''PSI–PSDI Unificati''), was the name of the federation of parties formed by the

Italian Socialist Party The Italian Socialist Party (, PSI) was a Socialism, socialist and later Social democracy, social-democratic List of political parties in Italy, political party in Italy, whose history stretched for longer than a century, making it one of the l ...

(PSI) and the

Italian Democratic Socialist Party The Italian Democratic Socialist Party (, PSDI), also known as Italian Social Democratic Party, was a minor social-democratic political party in Italy. The longest serving partner in government for Christian Democracy, the PSDI had been an ...

(PSDI) from 1966 to 1969. The parties membership was composed of 700,964 activists in 1966.

History

The two parties joined forces in 1966, after the PSI had joined the Italian government in 1963 for the first time since 1947, as part of

Aldo Moro Aldo Romeo Luigi Moro (; 23 September 1916 – 9 May 1978) was an Italian statesman and a prominent member of the Christian Democracy (DC). He served as prime minister of Italy from December 1963 to June 1968 and then from November 1974 to July 1 ...

's cabinets, composed of Christian Democracy, the

Italian Republican Party The Italian Republican Party ( it, Partito Repubblicano Italiano, PRI) is a liberal and social-liberal political party in Italy. Founded in 1895, the PRI is the oldest political party still active in Italy. The PRI has old roots and a long hist ...

and the PSDI. The united party achieved just 14.5% of the vote in the 1968 general election, due to the competition of the PSI's dissidents of the

Italian Socialist Party of Proletarian Unity The Italian Socialist Party of Proletarian Unity (''Partito Socialista Italiano di Unità Proletaria'', PSIUP) was a political party in Italy, active from 1964 to 1972. History The PSIUP was formed on 12 January 1964 by a leftist section of the ...

, the PSI-PSDI returned officially to the name PSI in October 1968, causing the split of the PSDI's former members in July 1969: these formed the "United Socialist Party", which was finally renamed PSDI in 1971.

Composition

Electoral results

Italian Parliament

Sources

{{DEFAULTSORT:Unified Socialist Party (Italy) 1966 establishments in Italy 1971 disestablishments in Italy Defunct political party alliances in Italy Defunct social democratic parties in Italy Political parties disestablished in 1971 Political parties established in 1966