The Historic Compromise (Italian: Compromesso storico), called also Third Phase (Italian: Terza Fase) or Democratic Alternative (Italian: Alternativa Democratica), was an Italian historical political alliance and accommodation between the Christian Democrats (DC) and the Italian Communist Party (PCI) in the 1970s.
In 1973, Enrico Berlinguer, General Secretary of the Italian Communist Party (PCI), launched in communist magazine Rinascita a proposal for a "democratic alliance" with Christian Democracy (DC), embraced by Aldo Moro. The call for this alliance was inspired by the overthrow of the Allende Government in Chile. For Berlinguer, the events in Chile proved that the Marxist left could not aspire to govern in democratic countries without establishing alliances with more moderate forces. After the 1973 Chilean coup, there was cooperation between the PCI and DC that became a political alliance in 1976. Then Berlinguer's PCI attempted to distance itself from the USSR, with the launching of "Eurocommunism" along with the Spanish Communist Party and the French Communist Party.
However, the Compromise was unpopular among the other centre-leftist groups like the Italian Republican Party (PRI) and Italian Socialist Party (PSI), led respectively by Ugo La Malfa and Bettino Craxi. Also the rightist Christian Democrat Giulio Andreotti had doubts about the accommodation.