in the 1960s marković became a major proponent of the praxis school of marxist interpretation, which emphasized the writings of young marx, and their dialectical and humanist aspects in particular. he also actively contributed to the international journal "praxis". due to his critical observations, together with seven other professors from the faculty of philosophy in belgrade, marković was suspended in january 1975, and finally lost his job in january 1981. after that, marković worked in the institute of social research until his retirement in 1986.