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 in the pre-communist administration of Muhammad Daoud Khan, decreased, turning negative by 1982 at 70.3 million $US. The only economic activity which grew substantially during Karmal's rule was export and import. Karmal observed in the spring of 1983 that without Soviet intervention, "It is unknown what the destiny of the Afghan Revolution would be ... We are realists and we clearly realize that in store for us yet lie trials and deprivations, losses and difficulties." Two weeks before this statement Sultan Ali Keshtmand, the Chairman of the Council of Ministers, lamented the fact that half the schools and three-quarters of