<prompt> Bhala okuqhubekayo kwalesi sigaba - Ubuhlobo phakathi kwe-PCI neSoviet Union kancane kancane bahlukana njengoba leli qembu lasuka ekulaleleni iSoviet kanye neMarxist-Leninist orthodoxy ngawo-1970 nawo-1980 futhi laya e-Eurocommunism naseSocialist International. I-PCI yafuna ukubambisana namaqembu amaSocialist kanye namaChristian Democracy i-Historic Compromise. Nokho, ukuthunjwa nokubulawa komholi weqembu lamaChristian Democrat u-Aldo Moro  <response>: Iqembu le-Russian Red Brigades ngoMeyi 1978 laqeda noma yiliphi ithemba lokuvumelana okunjalo. Le mpikiswano yalahlwa kakhulu njengenqubomgomo ye-PCI ngo-1981. I-Proletarian Unity Party yahlanganiswa ne-PCI ngo-1984. 