Rubuta ci gaba don wannan sakin layi - Dangantaka tsakanin PCI da Tarayyar Soviet a hankali sun lalace yayin da jam'iyyar ta ƙaura daga biyayya ta Soviet da koyarwar Marxist-Leninist a cikin 1970s da 1980s kuma zuwa ga Eurocommunism da Socialist International. PCI ya nemi haɗin gwiwa tare da jam'iyyun Socialist da na Dimokiradiyya na Kirista (Shirye-shiryen Tarihi). Koyaya, satar shugaban jam'iyyar Democrat Aldo Moro da kisan kai
da Red Brigades a watan Mayu 1978 ya kawo karshen duk wani fata na irin wannan sulhu. An yi watsi da wannan sulhu a matsayin manufofin PCI a 1981. Jam'iyyar Proletarian Unity Party ta haɗu da PCI a shekarar 1984.