The PCI in particular had been developing an independent line from Moscow for many years prior which had already been exhibited in 1968, when the party refused to support the Soviet invasion of Prague. In 1975, the PCI and the PCE had made a declaration regarding the "march toward socialism" to be done in "peace and freedom". In 1976, the PCI's leader Enrico Berlinguer had spoken of a "pluralistic system" ("sistema pluralistico" translated by the interpreter as "multiform system") in Moscow and in front of 5,000 communist delegates described the PCI's intentions to build "a socialism that we believe necessary and possible only in Italy". The Historic Compromise ("compromesso storico") with the Christian Democracy, stopped by the kidnapping and murder of Aldo Moro in 1978, was a consequence of this new policy.