Babrak Karmal befriended fellow inmate Mir Akbar Khyber, who introduced Karmal to Marxism. Karmal changed his name from Sultan Hussein to Babrak Karmal, which means "Comrade of the Workers'" in Pashtun, to disassociate himself from his bourgeois background. When he was released from prison, he continued his activities in the student union, and began to promote Marxism. Karmal spent the rest of the 1950s and the early 1960s becoming involved with Marxist organizations, of which there were at least four in Afghanistan at the time; two of the four were established by Karmal. When the 1964 Afghan Provisional Constitution, which legalised the
Babrak Karmal Amin was 50 votes short of being elected. The Parchamite victory may be explained by the simple fact that Karmal could contribute financially to the PDPA electoral campaign. Karmal became a leading figure within the student movement in the 1960s, electing Mohammad Hashim Maiwandwal as Prime Minister after a student demonstration (called for by Karmal) concluded with three deaths under the former leadership. In 1967, the PDPA unofficially split into two formal parties, one Khalqist and one Parchamist. The dissolution of the PDPA was initiated by the closing down of the Khalqist newspaper, "Khalq". Karmal criticised the "Khalq" for being