In the first part on the study, George Gurvitch 's conception on social determinism and human freedom is analyzed, some of his ideas are critically accepted. Social and historical determinism is not an absolute process of inevitable social events because determinism includes changeable degree of objective uncertainty and openness of future social development due to existence of two or more alternatives. Openness of social development yields possibility of relatively free human action and consequently possibility to take both right and wrong social estimations (political programs) and historical decisions as well. Social laws may function in three different ways: a) in 'pure' or adequate form if all conditions for their function are given; b) in distorted, disguised way if governments try to prevent action of social laws (socialist policy of planing production and of fixed prices); c) in cases when social laws function relatively free but with state limitations (policy of modern states to ban unlimited monopoly behavior in capitalism). Human freedom is defined as real social possibility to choose one from two or more options that are really given in a social situation (in one party political systems there are no political freedoms, even if majority of citizens accepts political systems). Possibility of relatively free human action, taking right or wrong decisions are illustrated with two historical examples: a) refusal of ultimatum of Austro-Hungarian government by Serbian government in 1914, which provoked military attack on Serbia and beginning of World War One, and b) military overthrow of government in March 27, 1941, that called out attack of Hitler's Germany and disintegration of the first Yugoslav state.