Congress of People's Deputies of the Soviet Union in the context of "Congress of Soviets"

The Communist Party of the Soviet Union (CPSU), at some points known as the Russian Communist Party (Bolsheviks) and the All-Union Communist Party (Bolsheviks), and sometimes referred to as the Bolshevik Party and Soviet Communist Party, was the founding and ruling political party of the Soviet Union. The CPSU was the sole governing party of the Soviet Union until 1990 when the Congress of People's Deputies modified Article 6 of the 1977 Soviet Constitution, which had previously granted the CPSU a monopoly over the political system. The party's main ideology was Marxism–Leninism. The party was outlawed under Russian president Boris Yeltsin's decree on 6 November 1991, citing the 1991 Soviet coup attempt as a reason.

The party started in 1898 as part of the Russian Social Democratic Labour Party (RSDLP). In 1903, that party split into a Menshevik (m) ("minority") and Bolshevik (b) ("majority") faction; the latter, led by Vladimir Lenin, is the direct ancestor of the CPSU and is the party that seized power in the October Revolution of 1917. Its activities were suspended on Soviet territory 74 years later, on 29 August 1991, soon after a failed coup d'état by conservative CPSU leaders against the reforming Soviet president and party general secretary Mikhail Gorbachev.

The Supreme Soviet of the Union of Soviet Socialist Republics (SSUSSR) was the highest organ of state authority of the Soviet Union from 1936 to 1991. Based on the principle of unified power, it was the only branch of government in the Soviet state, and headed the unified state apparatus.

Prior to 1936, the Congress of Soviets was the highest organ of state authority. During 1989–1991 a similar, but not identical organ acted as the highest organ of state authority. The Supreme Soviet appointed the Council of Ministers, the Supreme Court, and the Procurator General of the Soviet Union as well as elected the Presidium which served as the Soviet Union's collective head of state under both the 1936 and 1977 Soviet Constitutions.

The Supreme Soviet (Russian: Верховный Совет, romanized: Verkhovny Sovet, lit. 'Supreme Council') was the common name for the highest organs of state authority of the Soviet socialist republics (SSR) in the Union of Soviet Socialist Republics (USSR). These soviets were modeled after the Supreme Soviet of the USSR, established in 1938, and were nearly identical.

Party-approved delegates to the Supreme Soviets were periodically elected unopposed in show elections. The first free or semi-free elections took place during perestroika in late 1980s, in which Supreme Soviets themselves were no longer directly elected. Instead, Supreme Soviets were appointed by directly elected Congresses of People's Deputies based somewhat on the Congresses of Soviets that preceded the Supreme Soviets. The soviets until then were largely rubber-stamp institutions, approving decisions handed to them by the Communist Party of the USSR or of each SSR.

The Government of the Soviet Union (Russian: Правительство СССР, Pravitel'stvo SSSR), formally the All-Union Government of the Union of Soviet Socialist Republics, commonly abbreviated to Soviet Government, was the main executive institution of government in the former Soviet Union. It was led by a chairman, but the office was commonly referred to as Premier of the Soviet Union. The premier was nominated by the Central Committee of the Communist Party of the Soviet Union (CPSU) at the 1st Plenary Session of the Supreme Soviet of the Soviet Union in the aftermath of national elections. Certain governments, such as Ryzhkov's II, had more than 100 other government members, 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 Ivan Silayev.

Following the Treaty on the Creation of the USSR of 1922, the Russian Soviet Socialist Federative Republic, Ukrainian Socialist Soviet Republic, the Byelorussian Socialist Soviet Republic and the Transcaucasian Socialist Federative Soviet Republic established the Union of Soviet Socialist Republics (USSR). The treaty established the government, which was later legitimised by the adoption of the first Soviet constitution in 1924. The 1924 constitution made the government responsible to the Congress of Soviets of the Soviet Union. In 1936, the state system was reformed with the enactment of a new constitution. It abolished the Congress of Soviets and established the Supreme Soviet of the Soviet Union in its place. At the 1st Plenary Session of the II Supreme Soviet in 1946 the government was renamed Council of Ministers. Minor changes were introduced with the enactment of the 1977 constitution. The CPSU's 19th All-Union Conference voted in favor of amending the constitution. It allowed for multi-candidate elections, established the Congress of People's Deputies and weakened the party's control over the Supreme Soviet. Later on 20 March 1991 the Supreme Soviet on Mikhail Gorbachev's suggestion amended the constitution to establish a presidential system. The Council of Ministers was abolished and replaced by a Cabinet of Ministers that was responsible to the President of the Soviet Union. The head of the Cabinet of Ministers was the Prime Minister of the Soviet Union. The government was forced to resign in the aftermath of the 1991 Soviet coup d'état attempt, in which Prime Minister Valentin Pavlov participated in. In its place the Soviet state established what was supposed to be a transitory committee headed by Silayev to run the basic governmental functions until a new cabinet was appointed. On 26 December 1991 the Supreme Soviet dissolved the Soviet Union and therefore, the government of the Soviet Union.