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 may have divided between the different leadership styles and plans of Taraki versus Karmal. Taraki wanted to model the party after Leninist norms while Karmal wanted to establish a democratic front. Other differences were socioeconomic. The majority of Khalqists came from rural areas; hence they were poorer, and were of Pashtun origin. The Parchamites were urban, richer, and spoke Dari more often than not. The Khalqists accused the Parchamites of having a connection with the monarchy, and because of it, referred to the Parchamite PDPA as the "Royal Communist Party". Both Karmal and Amin retained their seats in the lower