Italian Social Democratic Party

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Not to be confused with Italian Democratic Socialist Party.
Italian Social Democratic Party
Partito Democratico Sociale Italiano
Secretary Giovanni Colonna di Cesarò
Founded 1922
Dissolved 1926
Merger of Constitutional Democratic Party, and other minors
Merged into Labour Democratic Party
Headquarters Rome
Ideology Social liberalism
Christian left
Political position Centre to Centre-left
National affiliation National Blocs (1922–1924)
International affiliation None

The Italian Social Democratic Party (Italian: Partito Democratico Sociale Italiano, PDSI) was a social-liberal political party in Italy.

It was formed for the 1919 general election by the union of the Constitutional Democratic Party with several other parties of the liberal left. In that occasion the PDSI, that was especially strong in Southern Italy, gained 10.9% of the vote and 60 seats in the Chamber of Deputies, while in 1921 it won 4.7% of the vote and 29 seats.[1] The party took part to the governments of Benito Mussolini until July 1924 as other liberal groups and was later disbanded. After World War II some of its members joined the Labour Democratic Party, a centre-left outfit.

Electoral results[edit]

Chamber of Deputies
Election year # of
overall votes
 % of
overall vote
# of
overall seats won
+/– Leader
1919 622,310 (#4) 10.9
60 / 508
Giovanni di Cesarò
1921 309,191 (#6) 4.7
29 / 535
Decrease 31
Giovanni di Cesarò
1924 111,035 (#10) 1.6
10 / 535
Decrease 19
Giovanni di Cesarò


  1. ^ Piergiorgio Corbetta; Maria Serena Piretti, Atlante storico-elettorale d'Italia, Zanichelli, Bologna 2009