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 house of parliament in the 1969 parliamentary election. Mohammed Daoud Khan, in collaboration with the Parchamite PDPA and radical military officers, overthrew the monarchy and instituted the Afghan Republic in 1973. After Daoud's seizure of power, an American embassy cable stated that the new government had established a Soviet-style Central Committee, in which Karmal and Mir Akbar Khyber were given leading positions. Most ministries were given to Parchamites; Hassan Sharq became Deputy Prime Minister, Major Faiz Mohammad became Minister of Internal Affairs and Nematullah Pazhwak became Minister of Education. The Parchamites took control over the ministries of finance, agriculture, communications