In the industrial sector the consolidation of various enterprises into trusts was undertaken in the early 1970s for the same reasons that the agroindustrial complexes were formed, that is, greater efficiency through concentration, specialization, and increased control. Bulgarian industrial growth since World War II had been remarkable, considering particularly the inadequate base of skilled labor and natural resources in a country that had been predominantly agricultural. Bulgaria's need for raw materials, machinery, and technological assistance during its long period of industrialization and the Soviet Union's willingness to supply them accounted in large measure for the extremely close economic ties between the two countries. Because the growth rate had begun to slow toward the end of the 1960s, the BKP decided to try a massive reorganization of the economic structure as a remedy for the situation.

In addition to the political and economic systems of the country, the social system has been a major concern of the party and government ever since the BKP took power. Social restructuring has resulted in a system wherein the party elite occupies the highest level. This group is small and represents the apex of the social pyramid. The next level down, which is much broader, includes lesser party functionaries, professionals, administrators and managers, technicians, and all white-collar workers. The next level is made up of blue-collar industrial workers, who constitute the largest group in the society. At the bottom of the structure are the peasants. There are, of course, gradations of power, privilege, and prestige within all of the social groupings. The society has been very mobile since World War II with rapid upward mobility based mainly on the expanding economy, industrialization, and modernization. Toward the end of the 1960s, as the economic growth rate slowed, so also did the social mobility, and there was evidence that social groups were stabilizing.

Education has been the key to upward mobility and, since coming to power, the Communists have given preference in educational opportunity to formerly underprivileged groups. At the beginning of the 1970s, however, the percentage of students of worker and peasant origin enrolled in institutions of higher learning was far below the percentage of workers and peasants in the population. Students from the lower income groups have not competed favorably against those from more advantaged backgrounds and, although upward mobility is not blocked, it has been becoming more difficult. Membership in the BKP remains important for persons desiring to move upward in the social structure.

For the leadership the importance of education lies in the fact that it is the best means for orienting the people in the official ideology as well as for training the professionals, technicians, and skilled workers needed to run the country. The ideological indoctrination is pervasive throughout the entire school system, but the concurrent goal of meeting the needs of the economy has suffered because the system of higher education has not expanded rapidly enough to absorb most secondary school graduates who are desirous and capable of pursuing higher studies. Many educational reforms have been enacted over the years, but they have been cautious and limited and have not attacked the major problem of providing much greater funding for higher education.

In the cultural sphere the party and government have promoted pride in the ancient Bulgarian heritage but have regulated art, music, and literature in order to bring about conformity with the Soviet-developed doctrine of Socialist Realism. Throughout the communist era there have been periods of freeze and thaw in the controls imposed on artists and intellectuals, but the periods of greatest restriction in later years have not equaled the severity of the Stalinist times. In the 1960s and early 1970s control has been exercised primarily through publishers, art galleries, theaters, and other outlets. Artists and intellectuals know that their work must pass through state-owned outlets if it is to be seen or heard; therefore, they exercise self-censorship to ensure acceptability. Other means of control are the professional unions that all artists, writers, and actors must join if their work is to be exhibited or published. The unions are run by the BKP and, in effect, become instruments through which the party promotes its cultural policies. For some artists conformity with ideological goals leads to upward social mobility, and some enjoy privileges and life-styles that are usually reserved for the ruling elite.

For control of the general population the government relies on the regular police, court, and penal systems, which are supplemented by state security police, paramilitary police auxiliaries, and militarized border guards. The regular police forces, the auxiliaries, and the state security police are all under the jurisdiction of the Ministry of Internal Affairs, whereas the border guards are subordinated to the army and are regulated by the Ministry of National Defense. Courts and penal institutions are under the Ministry of Justice.

Also as means of control, the government sanctions and the party operates a number of mass organizations that affect or influence the lives of most people in the country. The Fatherland Front is a large umbrella organization that includes all other groups as well as individual members. The other mass organizations include trade unions, youth groups, athletic societies, and similar interest groups. Other than these officially sanctioned groups, there are no organizations permitted and, because the party retains control through the leadership positions, all organized activity in the country comes under BKP supervision. Such organizations also serve as upward channels of information through which the party hierarchy is able to keep in touch with popular opinion.

Militarily, Bulgaria in 1973 maintained about 160,000 men in its armed forces, which are committed to the Soviet-dominated alliance known as the Warsaw Treaty Organization (Warsaw Pact). Ground forces constitute the great bulk of the so-called Bulgarian People's Army, but it also includes a small air and air defense force, a small naval force, and the border guards. All of the armed forces are under the supervision of the Ministry of National Defense, but top-level policymaking is a prerogative of the BKP. The party maintains great influence in the armed forces through the officer corps, 85 percent of which is made up of party members. Those officers who are not party members usually belong to the communist youth organization. Many career noncommissioned officers are also party members and, for the conscript in the ranks, political indoctrination is as regular as his military training.