Council of Ministers of the Soviet Union in the context of "Supreme Soviet of the Soviet Union"

The Government of the Union of Soviet Socialist Republics (USSR) was the executive and administrative organ of the highest body of state authority, the All-Union Supreme Soviet. It was formed on 30 December 1922 and abolished on 26 December 1991. The government was headed by a chairman, most commonly referred to as the premier of the Soviet Union, and several deputy chairmen throughout its existence. The Communist Party of the Soviet Union (CPSU), as "The leading and guiding force of Soviet society and the nucleus of its political system" per Article 6 of the state constitution, controlled the government by holding a two-thirds majority in the All-Union Supreme Soviet. The government underwent several name changes throughout its history, and was known as the Council of People's Commissars from 1922 to 1946, the Council of Ministers from 1946 to 1991, the Cabinet of Ministers from January to August 1991 and the Committee on the Operational Management of the National Economy from August to December 1991.

The government chairman was nominated by the Central Committee of the Communist Party of the Soviet Union (CPSU) and elected by delegates at the first plenary session of a newly elected Supreme Soviet of the Soviet Union. Certain governments, such as Ryzhkov's second government, had more than 100 government ministers, serving as first deputy premiers, deputy premiers, government ministers or heads of state committees/commissions; they were chosen by the premier and confirmed by the Supreme Soviet. The Government of the Soviet Union exercised its executive powers in conformity with the constitution of the Soviet Union and legislation enacted by the Supreme Soviet. The first government was led by Vladimir Lenin, and the last government was led by Valentin Pavlov.

The Committee for State Security (Russian: Комитет государственной безопасности, romanized: Komitet gosudarstvennoy bezopasnosti, IPA: [kəmʲɪˈtʲed ɡəsʊˈdarstvʲɪn(ː)əj bʲɪzɐˈpasnəsʲtʲɪ]), abbreviated as KGB (Russian: КГБ, IPA: [ˌkɛɡɛˈbɛ]; listen to both) was the main security agency of the Soviet Union from 1954 to 1991. It was the direct successor of preceding Soviet secret police agencies including the Cheka, OGPU, and NKVD. Attached to the Council of Ministers, it was the chief government agency of "union-republican jurisdiction", carrying out internal security, foreign intelligence, counter-intelligence and secret police functions. Similar agencies operated in each of the republics of the Soviet Union aside from the Russian SFSR, where the KGB was headquartered, with many associated ministries, state committees and state commissions.

The agency was a military service governed by army laws and regulations, in the same fashion as the Soviet Army or the MVD Internal Troops. While most of the KGB archives remain classified, two online documentary sources are available. Its main functions were foreign intelligence, counter-intelligence, operative-investigative activities, guarding the state border of the USSR, guarding the Soviet leadership, preserving the security of government communications as well as combating dissident and separatism within Soviet society.

The history of the Soviet Union from 1964 to 1982, referred to as the Brezhnev Era, covers the period of Leonid Brezhnev's rule of the Union of Soviet Socialist Republics (USSR). This period began with high economic growth and soaring prosperity, but gradually significant problems in social, political, and economic areas accumulated, so that the period is often described as the Era of Stagnation. In the 1970s, the Soviet Union and the United States both took a stance of "detente". The goal of this strategy was to warm up relations, in the hope that the Soviet Union would pursue economic and democratic reforms. However, this did not come until Mikhail Gorbachev took office in 1985.

Nikita Khrushchev was ousted as First Secretary of the Central Committee of the Communist Party of the Soviet Union (as well as Chairman of the Council of Ministers) on 14 October 1964, due to his failed reforms and the disregard for Party and Government institutions. Brezhnev replaced Khrushchev as First Secretary and Alexei Kosygin replaced him as Chairman of the Council of Ministers. Anastas Mikoyan, and later Nikolai Podgorny, became Chairmen of the Presidium of the Supreme Soviet. Together with Andrei Kirilenko as organizational secretary, and Mikhail Suslov as Chief Ideologue, they made up a reinvigorated collective leadership, which contrasted in form with the autocracy that characterized Khrushchev's rule.

The Ministry of Foreign Affairs of the Union of Soviet Socialist Republics (Russian: Министерство иностранных дел СССР) was founded on 6 July 1923. It had three names during its existence: People's Commissariat for Foreign Affairs (1923–1946), Ministry of Foreign Affairs (1946–1991) and Ministry of External Relations (1991). It was one of the most important government offices in the Soviet Union. The Ministry was led by the Minister of Foreign Affairs prior to 1991, and a Minister of External Relations in 1991. Every leader of the Ministry was nominated by the Chairman of the Council of Ministers and confirmed by the Presidium of the Supreme Soviet, and was a member of the Council of Ministers.

The Ministry of External Relations negotiated diplomatic treaties, handled Soviet foreign affairs along with the International Department of the Communist Party of the Soviet Union (CPSU) and aided in the guidance of world communism and anti-imperialism, both strong themes of Soviet policy. Before Mikhail Gorbachev became CPSU General Secretary, the organisational structure of the MER mostly stayed the same. As many other Soviet agencies, the MER had an inner-policy group known as the Collegium, made up of the minister, the two first deputy ministers and nine deputy ministers, among others. Each deputy minister usually headed his own department.

The Chairman of the Council of Ministers of the Soviet Union was the head of the government of the Soviet Union during the existence of the Council of Ministers of the Soviet Union from 1946 to 1991.

The Academy of Sciences of the Soviet Union was the highest scientific institution of the Soviet Union from 1925 to 1991. It united the country's leading scientists and was subordinated directly to the Council of Ministers of the Soviet Union (until 1946 the Council of People's Commissars of the Soviet Union).

In 1991, by the decree of the President of the Russian Soviet Federative Socialist Republic, the Russian Academy of Sciences was established on the basis of the Academy of Sciences of the Soviet Union.