In the 1970s, Mengistu embraced the philosophy of Marxism–Leninism, which was increasingly popular among many nationalists and revolutionaries throughout Africa and much of the Third World at the time. In the mid-1970s, under Mengistu's leadership, the Derg regime began an aggressive program of changing Ethiopia's system from a mixed feudal-capitalist emergent economy to an Eastern Bloc-style command economy. Shortly after coming to power, all rural land was nationalized, stripping the Ethiopian Church, the Imperial family, and the nobility of all their sizable estates and the bulk of their wealth. During this same period, all foreign-owned and locally owned companies were nationalized without compensation in an effort to redistribute the country's wealth. All undeveloped urban property and all rental property were also nationalized. Private businesses such as banks and insurance companies, large retail businesses, etc. were also taken over by the government. All this nationalized property was brought under the administration of large bureaucracies set up to administer them. Farmers who had once worked on land owned by absentee landlords were now compelled to join collective farms. All agricultural products were no longer to be offered on the free market but were to be controlled and distributed by the government. Despite progressive agricultural reforms, under the Derg, agricultural output suffered due to civil war, drought and misguided economic policies. There was also a famine in 1984, which was the 10th anniversary of the Derg.