The Union of Soviet Socialist Republics (USSR) existed from 1922 to 1991, becoming the largest country by area, spanning Eurasia and sharing borders with twelve countries. It was nominally a federal union of national republics, with the Russian SFSR being the largest. The USSR operated as a highly centralized, one-party state governed by the Communist Party of the Soviet Union (CPSU). Its capital was Moscow, and it served as a prominent communist state.
During the 1905 Russian Revolution, workers' councils known as Soviets first appeared.
After the February Revolution of 1917, workers' and soldiers' Soviets emerged throughout the country, sharing power with the Russian Provisional Government.
From 1810 to 1917, during the Russian Empire, the State Council functioned as a Council of Ministers.
In 1917 most of churches, synagogues and mosques were operating.
In 1917, Russia became the first great power to grant women the right to vote.
In 1917, before the revolution, health conditions in Russia were significantly behind those of developed countries.
In 1917, the October Revolution led by Vladimir Lenin established the Russian SFSR, the world's first constitutionally socialist state.
Beginning in October 1918, Lenin's government liberalized divorce and abortion laws, decriminalized homosexuality, permitted cohabitation, and ushered in a host of reforms.
1918–24 Turkestan
In 1918, the Council of People's Commissars decree established the Russian SFSR as a secular state and forbade the teaching of religion in general instruction.
In 1918, the Soviet health care system was conceived by the People's Commissariat for Health under the Semashko model, providing free health care to citizens controlled by the state.
In March 1919, the Hungarian Soviet Republic was established and lasted until August.
In August 1919, the Hungarian Soviet Republic came to an end.
1919–90 Bashkir
1920–25 Kirghiz1920–90 Tatar
1921–90 Nakhichevan
1921–91 Adjarian1921–45 Crimean1921–91 Dagestan1921–24 Mountain1921–90 Nakhichevan
By 1921, Lenin, Trotsky, and Stalin realized that capitalism had stabilized in Europe and that widespread revolutions were unlikely.
Excess deaths throughout World War I and the Russian Civil War (including the famine of 1921–1922 that was triggered by Lenin's war communism policies) amounted to a combined total of 18 million.
In 1921, Vladimir Lenin replaced the policy of war communism with the New Economic Policy (NEP), which legalized free trade and private ownership of small businesses.
In December 1922, the Treaty on the Creation of the USSR was signed by the founding republics.
1922–91 Yakut
During the Georgian Affair of 1922, Lenin proposed the formation of a greater union of Soviet republics.
Excess deaths throughout World War I and the Russian Civil War (including the famine of 1921–1922 that was triggered by Lenin's war communism policies) amounted to a combined total of 18 million.
In 1922, the Russian SFSR and its subordinate republics were merged into the Soviet Union.
In 1922, the United Kingdom opened trade relations and de facto diplomatic recognition with the Soviet Union.
1923–90 Buryat
In the summer of 1923, the Proletarian Sports Society "Dynamo" was established in Moscow as a sports organization of the Soviet secret police Cheka.
1924–40 Moldavian
Following Lenin's death in 1924, Joseph Stalin came to power in the Soviet Union.
In 1924, during the national delimitation in Central Asia, Uzbekistan and Turkmenistan were formed from parts of Russia's Turkestan ASSR and two Soviet dependencies, the Khorezm and Bukharan PSPs.
In 1924, formal recognition of the USSR came when the new Labour Party came to power in the United Kingdom.
In 1924, the constitution was promulgated in the Soviet Union but did not limit state power, and there was no formal separation of powers.
In July 1925, the Central Committee of the Russian Communist Party (Bolsheviks) adopted a statement "About the party's tasks in sphere of physical culture". This statement defined the role of physical culture in Soviet society and the party's tasks in the political leadership of the physical culture movement.
Under the Military Law of September 1925, the Soviet Armed Forces consisted of the Land Forces, the Air Force, the Navy, Joint State Political Directorate (OGPU) and the Internal Troops.
1925–92 Chuvash
In 1925, the Soviet government founded the League of Militant Atheists to intensify the propaganda campaign against religion.
1926–36 Kirghiz
In 1926, the birth rate in the USSR was 44.0 per thousand, while the mortality rate was 23.7 per thousand.
From 1927 the Soviet Union became a totalitarian state where freedom of speech was suppressed and dissent was punished.
In the period between 1927 and 1940, the number of Orthodox Churches in Russia fell from 29,584 to less than 500 (1.7%).
Compared to countries with similar per-capita GDP in 1928, the Soviet Union experienced significant growth.
In 1928, Stalin abandoned the New Economic Policy (NEP) and pushed for full central planning.
In 1928, the liquidation and deportation of millions of peasants began within the terms of the Soviet Civil Code.
By 1929, Stalin gained control of the country and pushed for full central planning, starting forced collectivization of agriculture and enacting draconian labour legislation.
In 1929, express prohibitions were adopted on a range of church activities, including meetings for organized Bible study.
Between 1930 and 1933, Stalin's policies of rapid industrialization and forced collectivization led to a famine that caused millions of deaths in the Soviet Union.
1931–92 Abkhaz
1932–92 Karakalpak
In 1932, the decriminalization of homosexuality was reversed.
Between 1930 and 1933, Stalin's policies of rapid industrialization and forced collectivization led to a famine that caused millions of deaths in the Soviet Union.
In 1933, the United States officially recognized the USSR, a decision backed by public opinion and US business interests.
1934–90 Udmurt
In 1934, Stalin reversed his policy with the Popular Front program, calling on Marxist parties to join with anti-Fascist forces.
In 1934, the OGPU became independent and joined the NKVD secret police.
In May 1935, the Franco-Soviet Treaty of Mutual Assistance was signed as Nazi Germany's power grew.
1935–43 Kalmyk
In 1935, Under Joseph Stalin, the death penalty was extended to adolescents as young as 12 years old.
1936–44 Kabardino-Balkarian1936–90 Komi1936–90 Mari
1936–90 North Ossetian
By 1936, Stalin reversed most of the liberal laws, ushering in a pronatalist era that lasted for decades.
In 1936, all republics began as socialist soviet.
In 1936, the Transcaucasian SFSR was dissolved, resulting in Armenia, Georgia, and Azerbaijan being elevated to Union Republics.
In 1936, the constitution was promulgated in the Soviet Union but did not limit state power, and there was no formal separation of powers.
More than 85,000 Orthodox priests were shot in 1937 alone.
In 1939, the Soviet Union and Nazi Germany signed a nonaggression pact.
In March 1940, after the Soviet invasion of Finland, the Karelo-Finnish SSR was formed on annexed territory.
By 1940, Stalin announced that illiteracy had been eliminated in the Soviet Union.
By 1940, as many as 90% of the churches, synagogues, and mosques that had been operating in 1917 were closed in the Soviet Union; the majority were demolished or re-purposed.
In the period between 1927 and 1940, the number of Orthodox Churches in Russia fell from 29,584 to less than 500 (1.7%).
After 1941, Stalin exercised his authority directly through his position in the Council of Ministers rather than the Politburo.
By 1941, only 500 churches remained open out of about 54,000 in existence before World War I.
By 1941, only a twelfth of the Russian Orthodox Church's priests were left functioning in their parishes.
Excess deaths during World War II (1941–1945) amounted to more than 20 million.
In 1943, a historic meeting between Stalin and Orthodox Church leader Patriarch Sergius of Moscow was held, marking a shift towards a more moderate religion policy.
1944–57 Kabardin
Excess deaths during World War II (1941–1945) amounted to more than 20 million.
From 1945 to 1991, USSR bordered Afghanistan, the People's Republic of China, Czechoslovakia, Finland, Hungary, Iran, Mongolia, North Korea, Norway, Poland, Romania, and Turkey.
In 1945, following World War II, the Cold War began as a period of geopolitical tension between the United States and the Soviet Union and their allies.
Before 1946, the Council of Ministers was known as the Council of People's Commissars.
In 1946, the People's Commissariat for Foreign Affairs was renamed the Ministry of Foreign Affairs.
In 1948, the USSR and other countries in the Soviet Bloc abstained from affirming the Universal Declaration of Human Rights.
In April 1951, the Soviet Olympic Committee was formed. The IOC recognized the new body in its 45th session. Also in 1951, Soviet representative Konstantin Andrianov became an IOC member, and the USSR officially joined the Olympic Movement.
Between 1952 and 1966, Politburo was called the Presidium.
In 1952, the Summer Olympics in Helsinki became the first Olympic Games for Soviet athletes. The Soviet Union emerged as a major rival to the United States at the Summer Olympics.
From 1941 to 1953, Stalin was the Premier of the Communist Party.
From 1953 to 1966, the general secretary was known as the First Secretary, the de facto highest office in the Soviet Union.
In 1953 the Soviet Union ended its period as a totalitarian state.
In 1953, Joseph Stalin died, and he had controlled all foreign relations of the Soviet Union during the interwar period.
In 1953, following Stalin's death, Nikita Khrushchev initiated a campaign of de-Stalinization in the Soviet Union.
In 1953, the Soviet Army was directly involved in suppressing the uprising in East Germany.
Beginning in 1954, the Soviet Union national ice hockey team began its era of dominance, winning nearly every world championship and Olympic tournament until 1991.
In 1955, the Soviet Union formed its own military alliance, the Warsaw Pact, in response to NATO.
In July 1956, the Karelo-Finnish SSR was incorporated into Russia as the Karelian ASSR.
1956–91 Karelian
In 1956, the Soviet Army was directly involved in suppressing the Hungarian Revolution.
1957–91 Kabardino-Balkarian
1958–90 Kalmyk
From 1958 to 1964, Khrushchev was the Premier of the Communist Party.
In 1958, under Nikita Khrushchev, the state leadership clashed with the churches, a period when atheism was emphasized in education.
After World War II, Strategic Missile Forces were formed in 1959.
From 1959 to 1965, the number of churches fell from 20,000 to 10,000.
Between 1960 and 1989, the growth rate of per capita income in the Soviet Union was slightly above the world average.
On 12 April 1961, the USSR launched Vostok 1, which carried Yuri Gagarin, making him the first human to ever be launched into space and complete a space journey.
1961–92 Tuvan
In 1963, the Chinese government articulated its criticism of the USSR's system and promoted China's ideological line as an alternative during the Sino-Soviet Split.
From 1958 to 1964, Khrushchev was the Premier of the Communist Party.
In 1964, under Nikita Khrushchev, the state leadership clashed with the churches, a period when atheism was emphasized in education.
In 2018, a Rating Sociological Group poll showed that 47% of Ukrainian respondents had a positive opinion of Soviet leader Leonid Brezhnev, who ruled the Soviet Union from 1964 to 1982.
From 1959 to 1965, the number of churches fell from 20,000 to 10,000.
In 1965, an attempt was made to legalize some elements of the decentralized economy with the reform of 1965.
Between 1952 and 1966, Politburo was called the Presidium.
In 1966, the International Covenant on Economic, Social and Cultural Rights was signed by the Soviet Union, but they were neither widely known or accessible to people living under Communist rule, nor were they taken seriously by the Communist authorities.
After 1968, the Soviet Union monopolized the top place in the medal standings at the Olympics, until its collapse.
In 1968, the Soviet Army was directly involved in the invasion of Czechoslovakia.
After 1970, the economic growth, while still positive, steadily declined much more quickly and consistently than in other countries, despite a rapid increase in the capital stock.
After World War II, National Civil Defense Forces were formed in 1970.
From the 1970s to the 1980s, the need for fuel declined in the Soviet Union, both per ruble of gross social product and per ruble of industrial product. At the start, this decline grew very rapidly but gradually slowed down between 1970 and 1975.
In 1970, the infant mortality rate in the USSR was 24.7.
In 1973, the Soviet Union signed human rights documents, but they were not widely known or taken seriously by authorities.
After 1974, the Soviet government stopped publishing statistics on infant mortality.
By 1974, the birth rate in the USSR decreased to 18.0 per thousand, mainly due to increasing urbanization and the rising average age of marriages, while the mortality rate decreased to 8.7 per thousand.
From the 1970s to the 1980s, the need for fuel declined in the Soviet Union, both per ruble of gross social product and per ruble of industrial product. From 1970 to 1975 the decline grew very rapidly but gradually slowed down between 1970 and 1975.
Article 42 of the 1977 Soviet Constitution gave all citizens the right to health protection and free access to any health institutions in the USSR.
In 1977, the constitution was promulgated in the Soviet Union but did not limit state power, and there was no formal separation of powers.
In 1979, the Soviet Union participated in the war in Afghanistan which continued until 1989.
From the 1970s to the 1980s, the need for fuel declined in the Soviet Union, both per ruble of gross social product and per ruble of industrial product. From 1975 to 1980, the decline grew even slower, only 2.6%.
In 1982, a poll conducted by Soviet authorities indicated that 20% of the Soviet population identified as 'active religious believers'.
In 2018, a Rating Sociological Group poll showed that 47% of Ukrainian respondents had a positive opinion of Soviet leader Leonid Brezhnev, who ruled the Soviet Union from 1964 to 1982.
Documents obtained in 2016 revealed that in 1984, prior to the country's decision to boycott the Games, the Soviet Union planned for a statewide doping system in track and field in preparation for the 1984 Summer Olympics in Los Angeles.
In the 1984 Winter games, the Soviet Union placed second, after another Eastern bloc nation, the GDR.
In 1985, Mikhail Gorbachev became the leader of the Soviet Union and sought to reform the country through his policies of glasnost and perestroika.
In 1986, a study published in the American Journal of Public Health claimed that, citing World Bank data, the Soviet model provided a better quality of life and human development than market economies at the same level of economic development in most cases.
In 1986, the Soviet Chernobyl disaster occurred, resulting in a large number of radioactive isotopes being released into the atmosphere.
In 1986, the number of higher education students per 10,000 people was 181 for the USSR, compared to 517 for the US.
In the late 1980s, the Soviet Union built the Mir orbital station. Mir was the only orbital station in operation from 1986 to 1998.
In 1987, Mikhail Gorbachev attempted to reform and revitalize the economy with his program of perestroika, relaxing state control over enterprises but not replacing it with market incentives, leading to a sharp decline in output.
Between 1988 and 1989 and 1993–1995, the Gini ratio increased by an average of 9 points for all former Soviet republics.
In 1988, Mikhail Gorbachev enacted reforms to shift power away from the highest bodies of the party due to considerable opposition.
In 1988, the Soviet Union was the largest producer and second-largest exporter of crude oil, surpassed only by Saudi Arabia.
In 1988, the first Soviet space shuttle, the Buran, flew, but without a human crew.
In 1988, total emissions in the Soviet Union were about 79% of those in the United States.
In March 1989, the Congress of People's Deputies was established, with the majority of members directly elected in competitive elections for the first time in Soviet history.
According to the last census in 1989, the Russian 'diaspora' in the Soviet republics had reached 25 million.
Between 1960 and 1989, the growth rate of per capita income in the Soviet Union was slightly above the world average.
Between 1988 and 1989 and 1993–1995, the Gini ratio increased by an average of 9 points for all former Soviet republics.
By 1989, Soviet scientists were among the world's best-trained specialists in several areas, such as energy physics, selected areas of medicine, mathematics, welding, space technology, and military technologies.
In 1989, the Soviet Union concluded its participation in the war in Afghanistan.
In 1989, the Soviet army consisted of two million soldiers divided between 150 motorized and 52 armored divisions. The navy had 500,000 men. The Strategic Missile Forces had more than 1,400 intercontinental ballistic missiles (ICBMs), deployed between 28 bases and 300 command centers in 1989.
In 1989, the ethnic demography of the Soviet Union showed that 69.8% was East Slavic, 17.5% was Turkic, and the remaining population was composed of Armenians, Balts, Uralic peoples, Tajiks, Georgians, Moldovans, and other various ethnic groups.
In 1989, various countries of the Warsaw Pact overthrew their Soviet-backed regimes, and nationalist movements erupted across the Soviet Union.
1990–91 Gorno-Altai
According to a 1990 estimate, the majority of the population in the Soviet Union were Russians (50.78%), followed by Ukrainians (15.45%) and Uzbeks (5.84%).
In 1990 the Soviet Union ended its period as a one-party state.
In 1990, Gorbachev introduced and assumed the position of President of the Soviet Union, concentrating power in his executive office.
In 1990, Russian assumed the de jure status as the official national language of the Soviet Union.
In 1990, the country had a Human Development Index of 0.920, placing it in the 'high' category of human development.
Until 1990, the Russian SFSR had no republican branch of the CPSU, being ruled directly by the union-wide party.
In August 1991, a failed coup attempt against Gorbachev by hardline communists hastened the end of the Soviet Union.
Between July 1956 and September 1991, there were 15 union republics.
In December 1991, the Soviet Union formally dissolved, ending nearly seven decades of Soviet rule.
1991–92 Crimean
Between 1991 and 1994, Russia, Kazakhstan, Latvia, Lithuania, and Estonia experienced a tripling of unemployment and a 42% increase in male death rates.
From 1945 to 1991, USSR bordered Afghanistan, the People's Republic of China, Czechoslovakia, Finland, Hungary, Iran, Mongolia, North Korea, Norway, Poland, Romania, and Turkey.
From the 1930s until its dissolution in late 1991, the way the Soviet economy operated remained essentially unchanged. The economy was formally directed by central planning.
In 1991, Soviet dental technology and dental health were considered notoriously bad, with the average 35-year-old having 12 to 14 cavities, fillings or missing teeth.
In 1991, according to the New Russia Barometer (NRB) polls, 50% of Russian respondents reported a positive impression of the Soviet Union.
In 1991, the Soviet Union had a pipeline network of 82,000 kilometres (51,000 mi) for crude oil and another 206,500 kilometres (128,300 mi) for natural gas.
In 1991, the construction of another Soviet space shuttle, Ptichka, which endured prolonged construction, was canceled.
In 1991, the total population of the Soviet Union was estimated at 293 million.
Until 1991, the Soviet Union national ice hockey team won nearly every world championship and Olympic tournament between 1954 and 1991 and never failed to medal in any International Ice Hockey Federation (IIHF) tournament in which they competed.
Between 1988 and 1989 and 1993–1995, the Gini ratio increased by an average of 9 points for all former Soviet republics.
Between 1991 and 1994, Russia, Kazakhstan, Latvia, Lithuania, and Estonia experienced a tripling of unemployment and a 42% increase in male death rates.
Between 1988 and 1989 and 1993–1995, the Gini ratio increased by an average of 9 points for all former Soviet republics.
In the late 1980s, the Soviet Union built the Mir orbital station. Mir was the only orbital station in operation from 1986 to 1998.
By 2000, approximately 75% of NRB respondents reported a positive impression of the Soviet Union, up from 50% in 1991.
In 2000, the crash of the K-141 Kursk submarine raised concerns about radioactive hazards.
In 2001 it was decided to bring the Mir orbital station into the atmosphere where it burned down.
In 2005, it was reported that 4,000 new cases of thyroid cancer had resulted from the Chernobyl accident's contamination.
In 2009, the percentage of NRB respondents with a positive impression of the Soviet Union dropped slightly to 71%, from 75% in 2000.
Since the dissolution of the Soviet Union, annual polling by the Levada Center has shown that over 50% of Russia's population regretted this event, with the only exception to this being in 2012 when support for the Soviet Union dipped below 50 percent.
According to the Levada Center's polls, in 2016, the primary reasons cited for Soviet nostalgia were the advantages of the shared economic union between the Soviet republics, including perceived financial stability. This was referenced by up to 53% of respondents.
In 2016, British journalist Andrew Jennings reported that a KGB colonel stated that the agency's officers had posed as anti-doping authorities from the International Olympic Committee (IOC) to undermine doping tests during the Soviet era.
A 2018 poll showed that 66% of Russians regretted the fall of the Soviet Union, setting a 15-year record. The majority of these opinions came from people older than 55.
In 2018, a Rating Sociological Group poll showed that 47% of Ukrainian respondents had a positive opinion of Soviet leader Leonid Brezhnev, who ruled the Soviet Union from 1964 to 1982.
In 2020, polls conducted by the Levada Center found that 75% of Russians agreed that the Soviet era was the greatest era in their country's history.
In 2021, a record 70% of Russians indicated they had a mostly/very favorable view of Joseph Stalin. Also, a 2021 poll conducted by the Levada Center found that 49% of Russians prefer the USSR's political system, while 18% prefer the current political system and 16% would prefer a Western democracy.
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