The Program for the Development of the National Economy of Bulgaria for 1961-1980, adopted by the VIII Congress of the Bulgarian Communist Party, envisages within two decades the completion of the construction of socialism and the gradual transition to the creation of the highest phase of communism. The implementation of this grandiose program involves the forced development of the mining and metallurgical industries, which form the basis for the growth of heavy industry.

The formation of the world system of socialism and its transformation into a decisive factor in the development of human society is the main distinguishing feature of the modern era. The commonwealth of countries forming the world system of socialism is based on the unity of the social and economic system, the commonality of interests and goals in the construction of communism. This determines a completely new nature of economic and political relations between the countries, which are based on the principles of proletarian internationalism and are characterized by full equality, respect for independence and sovereignty, cooperation and fraternal mutual assistance.