Trade unions in the Soviet Union, headed by the All-Union Central Council of Trade Unions, had a complex relationship with industrial management, the Communist Party of the Soviet Union, and the Soviet government given that the Soviet Union was ideologically supposed to be a state in which the members of the working class ruled the country and managed themselves.
During the Russian Revolution and the Russian Civil War that immediately followed, there were all sorts of ideas about how to organize and manage industries, and many people thought that the trade unions would be the vehicle of workers' control of industries. By the Stalinist era of the 1930s, it was clear that the party and government made the rules and that the trade unions were not permitted to challenge them in any substantial way. In the decades after Stalin, the worst of the powerlessness of the unions was past, but Soviet trade unions remained something closer to company unions, answering to the party and government, than to truly independent organizations. They did, however, challenge aspects of mismanagement more successfully than they had under Stalin.
By the time of the dissolution of the Soviet Union, the trade union system consisted of thirty unions organized by occupational branch. Including about 732,000 locals and 135 million members in 1984, unions encompassed almost all Soviet employees with the exception of some 4 to 5 million kolkhozniks. The All-Union Central Council of Trade Unions served as an umbrella organization for the thirty branch unions and was by far the largest public organization in the Soviet Union.