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
1981 in Afghanistan and consumer goods. According to UN statistics, 1.7 million Afghans have so far fled to Pakistan and some 400,000 to Iran in order to escape the strife in their country. President Karmal gives up the post of prime minister; he is succeeded in that position on June 11 by Sultan Ali Keshtmand, another trusted member of the Parcham faction of the PDPA. Keshtmand is also put in direct charge of the National Patriotic Front, set up in December 1980 with the intention of rallying the people behind Karmal's Marxist revolutionary government. Karmal announces a new set of proposals for negotiations