The history of the
Soviet Union
The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
(USSR) (1922–91) began with the ideals of the Russian
Bolshevik Revolution
The October Revolution, also known as the Great October Socialist Revolution (in Soviet historiography), October coup, Bolshevik coup, or Bolshevik revolution, was the second of two revolutions in Russia in 1917. It was led by Vladimir L ...
and ended in dissolution amidst economic collapse and political disintegration. Established in 1922 following the
Russian Civil War
The Russian Civil War () was a multi-party civil war in the former Russian Empire sparked by the 1917 overthrowing of the Russian Provisional Government in the October Revolution, as many factions vied to determine Russia's political future. I ...
, the Soviet Union quickly became a one-party state under the
Communist Party. Its early years under
Lenin
Vladimir Ilyich Ulyanov ( 187021 January 1924), better known as Vladimir Lenin, was a Russian revolutionary, politician and political theorist. He was the first head of government of Soviet Russia from 1917 until Death and state funeral of ...
were marked by the implementation of socialist policies and the
New Economic Policy (NEP), which allowed for market-oriented reforms.
The rise of
Joseph Stalin
Joseph Vissarionovich Stalin (born Dzhugashvili; 5 March 1953) was a Soviet politician and revolutionary who led the Soviet Union from 1924 until Death and state funeral of Joseph Stalin, his death in 1953. He held power as General Secret ...
in the late 1920s ushered in an era of intense centralization and totalitarianism. Stalin's rule was characterized by the forced
collectivization of agriculture, rapid
industrialization
Industrialisation (British English, UK) American and British English spelling differences, or industrialization (American English, US) is the period of social and economic change that transforms a human group from an agrarian society into an i ...
, and the
Great Purge
The Great Purge, or the Great Terror (), also known as the Year of '37 () and the Yezhovshchina ( , ), was a political purge in the Soviet Union that took place from 1936 to 1938. After the Assassination of Sergei Kirov, assassination of ...
, which eliminated perceived enemies of the state. The Soviet Union played a crucial role in the
Allied victory in
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, but at a tremendous human cost, with millions of Soviet citizens perishing in the conflict.
The Soviet Union emerged as one of the world's two superpowers, leading the
Eastern Bloc
The Eastern Bloc, also known as the Communist Bloc (Combloc), the Socialist Bloc, the Workers Bloc, and the Soviet Bloc, was an unofficial coalition of communist states of Central and Eastern Europe, Asia, Africa, and Latin America that were a ...
in opposition to the
Western Bloc led by the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
during the
Cold War
The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
. This period saw the USSR engage in an arms race, the
Space Race
The Space Race (, ) was a 20th-century competition between the Cold War rivals, the United States and the Soviet Union, to achieve superior spaceflight capability. It had its origins in the ballistic missile-based nuclear arms race between t ...
, and
proxy wars
In political science, a proxy war is an armed conflict where at least one of the belligerents is directed or supported by an external third-party power. In the term ''proxy war'', a belligerent with external support is the ''proxy''; both bel ...
around the globe. The post-Stalin leadership, particularly under
Nikita Khrushchev
Nikita Sergeyevich Khrushchev (– 11 September 1971) was the General Secretary of the Communist Party of the Soviet Union, First Secretary of the Communist Party of the Soviet Union from 1953 to 1964 and the Premier of the Soviet Union, Chai ...
, initiated a
de-Stalinization
De-Stalinization () comprised a series of political reforms in the Soviet Union after Death and state funeral of Joseph Stalin, the death of long-time leader Joseph Stalin in 1953, and Khrushchev Thaw, the thaw brought about by ascension of Nik ...
process, leading to a period of liberalization and relative openness known as the
Khrushchev Thaw
The Khrushchev Thaw (, or simply ''ottepel'')William Taubman, Khrushchev: The Man and His Era, London: Free Press, 2004 is the period from the mid-1950s to the mid-1960s when Political repression in the Soviet Union, repression and Censorship in ...
. However, the subsequent era under
Leonid Brezhnev
Leonid Ilyich Brezhnev (19 December 190610 November 1982) was a Soviet politician who served as the General Secretary of the Communist Party of the Soviet Union from 1964 until Death and state funeral of Leonid Brezhnev, his death in 1982 as w ...
, referred to as the
Era of Stagnation
The "Era of Stagnation" (, or ) is a term coined by Mikhail Gorbachev in order to describe the negative way in which he viewed the economic, political, and social policies of the Soviet Union that began during the rule of Leonid Brezhnev (1964 ...
, was marked by economic decline, political corruption, and a rigid
gerontocracy
A gerontocracy is a form of rule in which an entity is ruled by leaders who are substantially older than most of the adult population.
In many political structures, power within the ruling class accumulates with age, making the oldest individu ...
. Despite efforts to maintain the Soviet Union's superpower status, the economy struggled due to its centralized nature, technological backwardness, and inefficiencies. The vast military expenditures and burdens of maintaining the Eastern Bloc, further strained the Soviet economy.
In the 1980s,
Mikhail Gorbachev
Mikhail Sergeyevich Gorbachev (2 March 1931 – 30 August 2022) was a Soviet and Russian politician who served as the last leader of the Soviet Union from 1985 to dissolution of the Soviet Union, the country's dissolution in 1991. He served a ...
's policies of
Glasnost
''Glasnost'' ( ; , ) is a concept relating to openness and transparency. It has several general and specific meanings, including a policy of maximum openness in the activities of state institutions and freedom of information and the inadmissi ...
(openness) and
Perestroika
''Perestroika'' ( ; rus, перестройка, r=perestrojka, p=pʲɪrʲɪˈstrojkə, a=ru-perestroika.ogg, links=no) was a political reform movement within the Communist Party of the Soviet Union (CPSU) during the late 1980s, widely associ ...
(restructuring) aimed to revitalize the Soviet system but instead accelerated its unraveling. Nationalist movements gained momentum across the
Soviet republics, and the control of the Communist Party weakened. The failed
coup attempt in August 1991 against Gorbachev by hardline communists hastened the collapse of the Soviet Union, which formally dissolved on December 26, 1991, ending nearly seven decades of Soviet rule. It was legally inherited by the
Russian Federation
Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
. The legacy of the Soviet Union is complex, leaving behind significant industrial achievements, military prowess, cultural influence, and an impact on global politics, but also a record of repression, economic inefficiencies, and the suppression of political and personal freedoms.
Establishment (1917–1927)
Modern revolutionary activity in the
Russian Empire
The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...
began with the 1825
Decembrist revolt
The Decembrist revolt () was a failed coup d'état led by liberal military and political dissidents against the Russian Empire. It took place in Saint Petersburg on , following the death of Emperor Alexander I.
Alexander's brother and heir ...
. Although
serfdom
Serfdom was the status of many peasants under feudalism, specifically relating to manorialism and similar systems. It was a condition of debt bondage and indentured servitude with similarities to and differences from slavery. It developed du ...
was abolished in 1861, it was done on terms unfavourable to the peasants and served to encourage revolutionaries. A parliament, the
State Duma
The State Duma is the lower house of the Federal Assembly (Russia), Federal Assembly of Russia, with the upper house being the Federation Council (Russia), Federation Council. It was established by the Constitution of Russia, Constitution of t ...
, was established in 1906 after the
Russian Revolution of 1905
The Russian Revolution of 1905, also known as the First Russian Revolution, was a revolution in the Russian Empire which began on 22 January 1905 and led to the establishment of a constitutional monarchy under the Russian Constitution of 1906, t ...
, but
Emperor Nicholas II resisted attempts to move from
absolute
Absolute may refer to:
Companies
* Absolute Entertainment, a video game publisher
* Absolute Radio, (formerly Virgin Radio), independent national radio station in the UK
* Absolute Software Corporation, specializes in security and data risk ma ...
to a
constitutional monarchy
Constitutional monarchy, also known as limited monarchy, parliamentary monarchy or democratic monarchy, is a form of monarchy in which the monarch exercises their authority in accordance with a constitution and is not alone in making decisions. ...
.
Social unrest
Civil disorder, also known as civil disturbance, civil unrest, civil strife, or turmoil, are situations when law enforcement and security forces struggle to Public order policing, maintain public order or tranquility.
Causes
Any number of thin ...
continued and was aggravated during
World War I
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
by military defeat and food shortages in major cities.
A spontaneous popular demonstration in Petrograd on
8 March
Events Pre-1600
* 1010 – Ferdowsi completes his epic poem '' Shahnameh''.
* 1126 – Following the death of his mother, queen Urraca of León, Alfonso VII is proclaimed king of León.
* 1262 – Battle of Hausbergen between ...
1917, demanding peace and bread, culminated in the
February Revolution
The February Revolution (), known in Soviet historiography as the February Bourgeois Democratic Revolution and sometimes as the March Revolution or February Coup was the first of Russian Revolution, two revolutions which took place in Russia ...
and the abdication of Nicholas II and the imperial government. The
tsarist autocracy
Tsarist autocracy (), also called Tsarism, was an autocracy, a form of absolute monarchy in the Grand Duchy of Moscow and its successor states, the Tsardom of Russia and the Russian Empire. In it, the Tsar possessed in principle authority an ...
was replaced by the
social-democratic Russian Provisional Government
The Russian Provisional Government was a provisional government of the Russian Empire and Russian Republic, announced two days before and established immediately after the abdication of Nicholas II on 2 March, O.S. New_Style.html" ;"title="5 ...
, which intended to conduct elections to the
Russian Constituent Assembly
The All Russian Constituent Assembly () was a constituent assembly convened in Russia after the February Revolution of 1917. It met for 13 hours, from 4 p.m. to 5 a.m., , whereupon it was dissolved by the Bolshevik-led All-Russian Central Ex ...
and to continue fighting on the side of the
Entente in World War I. At the same time,
workers' councils, known in Russian as '
Soviets', sprang up across the country, and the most influential of them, the
Petrograd Soviet of Workers' and Soldiers' Deputies, shared power with the Provisional Government.
Membership of the
Bolshevik
The Bolsheviks, led by Vladimir Lenin, were a radical Faction (political), faction of the Marxist Russian Social Democratic Labour Party (RSDLP) which split with the Mensheviks at the 2nd Congress of the Russian Social Democratic Labour Party, ...
party had risen from 24,000 members in February 1917 to 200,000 members by September 1917. 50,000 workers had passed a resolution in favour of the Bolshevik demand for the transfer of power to the Soviets.

The Bolsheviks, led by
Vladimir Lenin
Vladimir Ilyich Ulyanov ( 187021 January 1924), better known as Vladimir Lenin, was a Russian revolutionary, politician and political theorist. He was the first head of government of Soviet Russia from 1917 until Death and state funeral of ...
, pushed for
communist revolution in the Soviets and on the streets, adopting the slogan of "All Power to the Soviets" and urging the overthrow of the Provisional Government. On 7 November 1917, Bolshevik
Red Guards stormed the
Winter Palace in Petrograd, arresting the Provisional Government leaders and Lenin declared that all power was now transferred to the Soviets.
This event would later be officially known in Soviet bibliographies as the "
Great October Socialist Revolution". Bolshevik figures such as
Anatoly Lunacharsky
Anatoly Vasilyevich Lunacharsky (, born ''Anatoly Aleksandrovich Antonov''; – 26 December 1933) was a Russian Marxist revolutionary and the first Soviet People's Commissariat for Education, People's Commissar (minister) of Education, as well ...
,
Moisei Uritsky, and
Dmitry Manuilsky agreed that Lenin's influence on the Bolshevik party was decisive but the
October insurrection was carried out according to
Trotsky's, not to Lenin's plan. The initial stage of the October Revolution which involved the assault on
Petrograd occurred largely without any human
casualties.
Lenin's government instituted a number of progressive measures such as
universal education,
universal healthcare
Universal health care (also called universal health coverage, universal coverage, or universal care) is a health care system in which all residents of a particular country or region are assured right to health, access to health care. It is genera ...
, and
equal rights for women. Conversely, the bloody
Red Terror
The Red Terror () was a campaign of political repression and Mass killing, executions in Russian Soviet Federative Socialist Republic, Soviet Russia which was carried out by the Bolsheviks, chiefly through the Cheka, the Bolshevik secret police ...
was initiated to shut down all opposition, both perceived and real. The terror also arose in response to a number of
assassination attempts on Bolshevik senior leaders and
organized insurrections against the Soviet government.
The
federalization of Russia was promulgated in the
Declaration of the Rights of the Peoples of Russia
The Declaration of the Rights of the Peoples of Russia () was a document promulgated by the Bolshevik government of Russian Soviet Federative Socialist Republic, Russia on 15 November 1917 (2 November in Adoption of the Gregorian calendar#Adopt ...
in November, not including the detached borderlands.
In December, the Bolsheviks signed an
armistice
An armistice is a formal agreement of warring parties to stop fighting. It is not necessarily the end of a war, as it may constitute only a cessation of hostilities while an attempt is made to negotiate a lasting peace. It is derived from t ...
with the
Central Powers
The Central Powers, also known as the Central Empires,; ; , ; were one of the two main coalitions that fought in World War I (1914–1918). It consisted of the German Empire, Austria-Hungary, the Ottoman Empire, and the Kingdom of Bulga ...
, though by February 1918, fighting had resumed. In March, the Soviets ended their involvement in the war and signed a
separate peace treaty, the
Treaty of Brest-Litovsk
The Treaty of Brest-Litovsk was a separate peace treaty signed on 3 March 1918 between Soviet Russia and the Central Powers (Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria), by which Russia withdrew from World War I. The treaty, whi ...
. After the defeat of the Germans in the war, Lenin sought the creation of formally independent
Soviet republics in the territories that were being vacated by the German Army.
A long and bloody
civil war
A civil war is a war between organized groups within the same Sovereign state, state (or country). The aim of one side may be to take control of the country or a region, to achieve independence for a region, or to change government policies.J ...
ensued between the
Reds and the
Whites
White is a racial classification of people generally used for those of predominantly European ancestry. It is also a skin color specifier, although the definition can vary depending on context, nationality, ethnicity and point of view.
De ...
, ending in 1921–1922 with the Reds' victory. It included
foreign intervention, the
murder of the former emperor and his family, and the
famine of 1921–1922, which killed about five million people. Although Lenin had declared his support for the principle of
self-determination
Self-determination refers to a people's right to form its own political entity, and internal self-determination is the right to representative government with full suffrage.
Self-determination is a cardinal principle in modern international la ...
, the party became centralized and the independent Soviet republics were subordinated to Soviet Russia. In March 1921, the
Treaty of Riga was signed with the
Republic of Poland, splitting territories in
Belarus
Belarus, officially the Republic of Belarus, is a landlocked country in Eastern Europe. It is bordered by Russia to the east and northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Belarus spans an a ...
and
Ukraine
Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...
, and putting an end to Lenin's westward offensive against capitalism. In
Estonia
Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...
,
Finland
Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, ...
,
Latvia
Latvia, officially the Republic of Latvia, is a country in the Baltic region of Northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to t ...
, and
Lithuania
Lithuania, officially the Republic of Lithuania, is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea, bordered by Latvia to the north, Belarus to the east and south, P ...
, the Reds were defeated, while the Red Army managed to occupy
Armenia
Armenia, officially the Republic of Armenia, is a landlocked country in the Armenian Highlands of West Asia. It is a part of the Caucasus region and is bordered by Turkey to the west, Georgia (country), Georgia to the north and Azerbaijan to ...
,
Azerbaijan
Azerbaijan, officially the Republic of Azerbaijan, is a Boundaries between the continents, transcontinental and landlocked country at the boundary of West Asia and Eastern Europe. It is a part of the South Caucasus region and is bounded by ...
, and
Georgia
Georgia most commonly refers to:
* Georgia (country), a country in the South Caucasus
* Georgia (U.S. state), a state in the southeastern United States
Georgia may also refer to:
People and fictional characters
* Georgia (name), a list of pe ...
in the
Caucasus
The Caucasus () or Caucasia (), is a region spanning Eastern Europe and Western Asia. It is situated between the Black Sea and the Caspian Sea, comprising parts of Southern Russia, Georgia, Armenia, and Azerbaijan. The Caucasus Mountains, i ...
. Additionally, the forced requisition of food by the Soviet government led to substantial resistance, of which the most notable was the
Tambov Rebellion, ultimately put down by the Red Army.

The civil war had a devastating impact on the economy. A
black market
A black market is a Secrecy, clandestine Market (economics), market or series of transactions that has some aspect of illegality, or is not compliant with an institutional set of rules. If the rule defines the set of goods and services who ...
emerged in Russia, despite the threat of
martial law
Martial law is the replacement of civilian government by military rule and the suspension of civilian legal processes for military powers. Martial law can continue for a specified amount of time, or indefinitely, and standard civil liberties ...
against profiteering. The
ruble collapsed, with
barter
In trade, barter (derived from ''bareter'') is a system of exchange (economics), exchange in which participants in a financial transaction, transaction directly exchange good (economics), goods or service (economics), services for other goods ...
increasingly replacing money as a medium of exchange
and, by 1921, heavy industry output had fallen to 20% of 1913 levels. 90% of wages were paid with goods rather than money. 70% of locomotives were in need of repair, and food requisitioning, combined with the effects of seven years of war and a severe drought, contributed to a famine that caused between 3 and 10 million deaths. Coal production decreased from 27.5 million tons (1913) to 7 million tons (1920), while overall factory production also declined from 10,000 million roubles to 1,000 million roubles. According to the noted historian
David Christian, the grain harvest was also slashed from 80.1 million tons (1913) to 46.5 million tons (1920).
Treaty on the Creation of the USSR
On 28 December 1922, a conference of plenipotentiary delegations from the
Russian SFSR
The Russian Soviet Federative Socialist Republic (Russian SFSR or RSFSR), previously known as the Russian Socialist Federative Soviet Republic and the Russian Soviet Republic, and unofficially as Soviet Russia,Declaration of Rights of the labo ...
, the
Transcaucasian SFSR, the
Ukrainian SSR
The Ukrainian Soviet Socialist Republic, abbreviated as the Ukrainian SSR, UkrSSR, and also known as Soviet Ukraine or just Ukraine, was one of the Republics of the Soviet Union, constituent republics of the Soviet Union from 1922 until 1991. ...
, and the
Byelorussian SSR approved the
Treaty on the Creation of the USSR
A treaty is a formal, legally binding written agreement between sovereign states and/or international organizations that is governed by international law. A treaty may also be known as an international agreement, protocol, covenant, conventio ...
and the
Declaration of the Creation of the USSR, forming the Union of Soviet Socialist Republics. These two documents were confirmed by the first
Congress of Soviets of the USSR and signed by the heads of the delegations,
Mikhail Kalinin
Mikhail Ivanovich Kalinin (, ; 3 June 1946) was a Soviet politician and Russian Old Bolshevik revolutionary who served as the first chairman of the Presidium of the Supreme Soviet (head of state) from 1938 until his resignation in 1946. From ...
,
Mikhail Tskhakaya
Mikhail Grigoryevich Tskhakaya ( ka, მიხეილ გრიგოლის ძე ცხაკაია, ; 4 May 1865 – 19 March 1950), also known as Barsov, was a Georgian revolutionary and Soviet politician. Barsov was a senior leader i ...
,
Mikhail Frunze
Mikhail Vasilyevich Frunze (; ; 2 February 1885 – 31 October 1925) was a Soviet revolutionary, politician, army officer and military theory, military theorist.
Born to a Bessarabian father and a Russian mother in Russian Turkestan, Frunze at ...
,
Grigory Petrovsky, and
Alexander Chervyakov
Alexander Grigoryevich Chervyakov (Aliaksandr Charviakou, , ''Aliaksandr Ryhoravič Čarviakoŭ'' , ''Aleksandr Grigor'evič Červjakov''; 25 February 1892 — 16 June 1937) was a Soviet Union, Soviet Politician and revolutionary and one of the f ...
, on 30 December 1922. The formal proclamation was made from the stage of the
Bolshoi Theatre
The Bolshoi Theatre ( rus, Большо́й теа́тр, r=Bol'shoy teatr, p=bɐlʲˈʂoj tʲɪˈat(ə)r, t=Grand Theater) is a historic opera house in Moscow, Russia, originally designed by architect Joseph Bové. Before the October Revolutio ...
in Moscow.
An intensive restructuring of the economy, industry, and politics of the country began in the early days of Soviet power in 1917. A large part of this was done according to the
Bolshevik Initial Decrees, government documents signed by Vladimir Lenin. One of the most prominent breakthroughs was the
GOELRO plan, which envisioned a major restructuring of the Soviet economy based on total
electrification
Electrification is the process of powering by electricity and, in many contexts, the introduction of such power by changing over from an earlier power source. In the context of history of technology and economic development, electrification refe ...
of Russia. The plan became the prototype for subsequent
Five-Year Plans and was fulfilled by 1931.
[On GOELRO Plan – at Kuzbassenergo.]
After the economic policy of '
War communism
War communism or military communism (, ''Vojenný kommunizm'') was the economic and political system that existed in Soviet Russia during the Russian Civil War from 1918 to 1921. War communism began in June 1918, enforced by the Supreme Economi ...
' during the Russian Civil War, as a prelude to fully developing
socialism
Socialism is an economic ideology, economic and political philosophy encompassing diverse Economic system, economic and social systems characterised by social ownership of the means of production, as opposed to private ownership. It describes ...
in the country, the Soviet government
permitted some private enterprise to coexist alongside nationalized industry in the 1920s, and total food requisition in the countryside was replaced by a food tax.

From its creation, the government in the Soviet Union was based on the
one-party rule of the
Communist Party (Bolsheviks). The stated purpose was to prevent the return of capitalist exploitation, and that the principles of
democratic centralism
Democratic centralism is the organisational principle of most communist parties, in which decisions are made by a process of vigorous and open debate amongst party membership, and are subsequently binding upon all members of the party. The co ...
would be the most effective in representing the people's will in a practical manner. The debate over the future of the economy provided the background for a power struggle in the years after Lenin's death in 1924. Initially, Lenin was to be replaced by a '
troika' consisting of
Grigory Zinoviev of the
Ukrainian SSR
The Ukrainian Soviet Socialist Republic, abbreviated as the Ukrainian SSR, UkrSSR, and also known as Soviet Ukraine or just Ukraine, was one of the Republics of the Soviet Union, constituent republics of the Soviet Union from 1922 until 1991. ...
,
Lev Kamenev
Lev Borisovich Kamenev. ( Rozenfeld; – 25 August 1936) was a Russian revolutionary and Soviet politician. A prominent Old Bolsheviks, Old Bolshevik, Kamenev was a leading figure in the early Soviet government and served as a Deputy Premier ...
, of the
Russian SFSR
The Russian Soviet Federative Socialist Republic (Russian SFSR or RSFSR), previously known as the Russian Socialist Federative Soviet Republic and the Russian Soviet Republic, and unofficially as Soviet Russia,Declaration of Rights of the labo ...
, and
Joseph Stalin
Joseph Vissarionovich Stalin (born Dzhugashvili; 5 March 1953) was a Soviet politician and revolutionary who led the Soviet Union from 1924 until Death and state funeral of Joseph Stalin, his death in 1953. He held power as General Secret ...
, of the
Transcaucasian SFSR.
In February 1924, the USSR was recognized by the United Kingdom. The same year, a
Soviet Constitution was approved, legitimizing the December 1922 union.
According to
Archie Brown the constitution was never an accurate guide to political reality in the USSR. For example, the fact that the Party played the leading role in making and enforcing policy was not mentioned in it until 1977. The USSR was a federative entity of many constituent republics, each with its own political and administrative entities. However, the term 'Soviet Russia'formally applicable only to the Russian Federative Socialist Republicwas often applied to the entire country by non-Soviet writers due to its domination by the Russian SFSR.
Stalinism (1927–1953)
On 3 April 1922, Stalin was named the
General Secretary of the Communist Party of the Soviet Union
The General Secretary of the Central Committee of the Communist Party of the Soviet Union. was the Party leader, leader of the Communist Party of the Soviet Union (CPSU). From 1924 until the dissolution of the Soviet Union, country's dissoluti ...
. Lenin had appointed Stalin the head of the
Workers' and Peasants' Inspectorate, which gave Stalin considerable power. By
gradually consolidating his influence and isolating and outmaneuvering his rivals within the party, Stalin became the
undisputed leader of the country and, by the end of the 1920s, established a
totalitarian
Totalitarianism is a political system and a form of government that prohibits opposition from political parties, disregards and outlaws the political claims of individual and group opposition to the state, and completely controls the public sph ...
rule. In October 1927,
Zinoviev and
Leon Trotsky
Lev Davidovich Bronstein ( – 21 August 1940), better known as Leon Trotsky,; ; also transliterated ''Lyev'', ''Trotski'', ''Trockij'' and ''Trotzky'' was a Russian revolutionary, Soviet politician, and political theorist. He was a key figure ...
were expelled from the
Central Committee and forced into exile.
In 1928, Stalin introduced the
first five-year plan for building a
socialist economy
Socialist economics comprises the economic theories, practices and norms of hypothetical and existing socialist economic systems. A socialist economic system is characterized by social ownership and operation of the means of production that m ...
. In place of the
internationalism expressed by Lenin throughout the revolution, it aimed to build
Socialism in One Country. In industry, the state assumed control over all existing enterprises and undertook an intensive program of
industrialization
Industrialisation (British English, UK) American and British English spelling differences, or industrialization (American English, US) is the period of social and economic change that transforms a human group from an agrarian society into an i ...
. In
agriculture
Agriculture encompasses crop and livestock production, aquaculture, and forestry for food and non-food products. Agriculture was a key factor in the rise of sedentary human civilization, whereby farming of domesticated species created ...
, rather than adhering to the 'lead by example' policy advocated by Lenin, forced
collectivization of farms was implemented all over the country.
Famines ensued as a result, causing deaths estimated at three to seven million; surviving
kulak
Kulak ( ; rus, кула́к, r=kulák, p=kʊˈɫak, a=Ru-кулак.ogg; plural: кулаки́, ''kulakí'', 'fist' or 'tight-fisted'), also kurkul () or golchomag (, plural: ), was the term which was used to describe peasants who owned over ...
s (wealthy or middle-class peasants) were persecuted, and many were sent to
Gulag
The Gulag was a system of Labor camp, forced labor camps in the Soviet Union. The word ''Gulag'' originally referred only to the division of the Chronology of Soviet secret police agencies, Soviet secret police that was in charge of runnin ...
s to do
forced labor
Forced labour, or unfree labour, is any work relation, especially in modern or early modern history, in which people are employed against their will with the threat of destitution, detention, or violence, including death or other forms of ...
. Social upheaval continued in the mid-1930s. Despite the turmoil of the mid-to-late 1930s, the country developed a robust industrial economy in the years preceding
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
.

Closer cooperation between the USSR and the West developed in the early 1930s. From 1932 to 1934, the country participated in the
World Disarmament Conference
The Conference for the Reduction and Limitation of Armaments, generally known as the Geneva Conference or World Disarmament Conference, was an international conference of states held in Geneva, Switzerland, between February 1932 and November 1934 ...
. In 1933, diplomatic relations between the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
and the USSR were established when in November, the newly elected President of the United States, Franklin D. Roosevelt, chose to recognize Stalin's Communist government formally and negotiated a new trade agreement between the two countries. In September 1934, the country joined the
League of Nations
The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...
. After the
Spanish Civil War
The Spanish Civil War () was a military conflict fought from 1936 to 1939 between the Republican faction (Spanish Civil War), Republicans and the Nationalist faction (Spanish Civil War), Nationalists. Republicans were loyal to the Left-wing p ...
broke out in 1936, the USSR actively supported the
Republican forces against the
Nationalists, who were supported by
Fascist Italy
Fascist Italy () is a term which is used in historiography to describe the Kingdom of Italy between 1922 and 1943, when Benito Mussolini and the National Fascist Party controlled the country, transforming it into a totalitarian dictatorship. Th ...
and
Nazi Germany
Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...
.
In December 1936, Stalin unveiled a new
constitution
A constitution is the aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organization or other type of entity, and commonly determines how that entity is to be governed.
When these pri ...
that was praised by supporters around the world as the most democratic constitution imaginable, though there was some skepticism. American historian J. Arch Getty concludes: "Many who lauded Stalin's Soviet Union as the most democratic country on earth lived to regret their words. After all, the Soviet Constitution of 1936 was adopted on the eve of the Great Terror of the late 1930s; the "thoroughly democratic" elections to the first Supreme Soviet permitted only uncontested candidates and took place at the height of the savage violence in 1937. The civil rights, personal freedoms, and democratic forms promised in the Stalin constitution were trampled almost immediately and remained dead letters until long after Stalin's death."

Stalin's
Great Purge
The Great Purge, or the Great Terror (), also known as the Year of '37 () and the Yezhovshchina ( , ), was a political purge in the Soviet Union that took place from 1936 to 1938. After the Assassination of Sergei Kirov, assassination of ...
resulted in the detainment or execution of many '
Old Bolsheviks' who had participated in the October Revolution. According to declassified Soviet archives, the
NKVD
The People's Commissariat for Internal Affairs (, ), abbreviated as NKVD (; ), was the interior ministry and secret police of the Soviet Union from 1934 to 1946. The agency was formed to succeed the Joint State Political Directorate (OGPU) se ...
arrested more than one and a half million people in 1937 and 1938, of whom 681,692 were shot.
Over those two years, there were an average of over one thousand executions a day. Scholars estimate the total death toll for the Great Purge (1936–1938), including fatalities attributed to prison conditions, to be roughly 700,000-1.2 million.
In 1939, after attempts to form a military alliance with Britain and France against Germany failed, the Soviet Union made a dramatic shift towards Nazi Germany. Almost a year after Britain and France had concluded the
Munich Agreement
The Munich Agreement was reached in Munich on 30 September 1938, by Nazi Germany, the United Kingdom, the French Third Republic, French Republic, and the Kingdom of Italy. The agreement provided for the Occupation of Czechoslovakia (1938–194 ...
with Germany, the Soviet Union made agreements with Germany as well, both militarily and economically during
extensive talks. Unlike the case of Britain and France, the Soviet Union's agreement with Germany, the
Molotov–Ribbentrop Pact
The Molotov–Ribbentrop Pact, officially the Treaty of Non-Aggression between Germany and the Union of Soviet Socialist Republics, and also known as the Hitler–Stalin Pact and the Nazi–Soviet Pact, was a non-aggression pact between Nazi Ge ...
(signed on 23 August 1939), included a secret protocol that paved the way for the Soviet invasion of Eastern European states and
occupation of their territories. The pact made possible the Soviet occupation of
Lithuania, Latvia, Estonia,
Bessarabia, northern Bukovina, and
eastern Poland.
In the far east, the Soviet military won several decisive victories during
border clashes with the
Empire of Japan
The Empire of Japan, also known as the Japanese Empire or Imperial Japan, was the Japanese nation state that existed from the Meiji Restoration on January 3, 1868, until the Constitution of Japan took effect on May 3, 1947. From Japan–Kor ...
in 1938 and 1939. However, in April 1941, the USSR signed the
Soviet–Japanese Neutrality Pact with Japan, which the Soviets would unilaterally break in 1945, recognizing the territorial integrity of
Manchukuo
Manchukuo, officially known as the State of Manchuria prior to 1934 and the Empire of Great Manchuria thereafter, was a puppet state of the Empire of Japan in Northeast China that existed from 1932 until its dissolution in 1945. It was ostens ...
, a Japanese
puppet state
A puppet state, puppet régime, puppet government or dummy government is a State (polity), state that is ''de jure'' independent but ''de facto'' completely dependent upon an outside Power (international relations), power and subject to its ord ...
. The pact ensured Japan would not enter the World War II against the USSR on the side of Germany later.
World War II

On 1 September, Germany
invaded Poland and on the 17th the Soviet Union invaded Poland as well. On 6 October, Poland fell and part of the Soviet occupation zone was then handed over to Germany. On 10 October, the Soviet Union and Lithuania signed an agreement whereby the Soviet Union transferred Polish sovereignty over the Vilna region to Lithuania, and on 28 October the boundary between the Soviet occupation zone and the new territory of Lithuania was officially demarcated. On 1 November, the Soviet Union
annexed Western Ukraine, followed by Western Belarus on the 2nd. In late November, unable to coerce the
Republic of Finland by diplomatic means into moving its border back from
Leningrad
Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...
, Stalin ordered the
invasion of Finland. On 14 December 1939, the Soviet Union was expelled from the
League of Nations
The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...
for invading Finland.
Germany broke the Molotov–Ribbentrop Pact and
invaded the Soviet Union on 22 June 1941 starting what is known in Russia and some other post-Soviet states as the
Great Patriotic War
The Eastern Front, also known as the Great Patriotic War (term), Great Patriotic War in the Soviet Union and its successor states, and the German–Soviet War in modern Germany and Ukraine, was a Theater (warfare), theatre of World War II ...
. The
Red Army
The Workers' and Peasants' Red Army, often shortened to the Red Army, was the army and air force of the Russian Soviet Republic and, from 1922, the Soviet Union. The army was established in January 1918 by a decree of the Council of People ...
stopped the seemingly invincible German Army at the
Battle of Moscow
The Battle of Moscow was a military campaign that consisted of two periods of strategically significant fighting on a sector of the Eastern Front during World War II, between October 1941 and January 1942. The Soviet defensive effort frustrated H ...
. The
Battle of Stalingrad, which lasted from late 1942 to early 1943, dealt a severe blow to Germany from which they never fully recovered and became a turning point in the war. After Stalingrad, Soviet forces drove through Eastern Europe to Berlin before
Germany surrendered in 1945. The German Army suffered 80% of its military deaths in the Eastern Front.
Harry Hopkins
Harold Lloyd Hopkins (August 17, 1890 – January 29, 1946) was an American statesman, public administrator, and presidential advisor. A trusted deputy to President Franklin Delano Roosevelt, Hopkins directed New Deal relief programs before ser ...
, a close foreign policy advisor to Franklin D. Roosevelt, spoke on 10 August 1943 of the USSR's decisive role in the war, saying that "While in Sicily the forces of Great Britain and the United States are being opposed by 2 German divisions, the Russian front is receiving attention of approximately 200 German divisions." Up to 34 million soldiers served in the Red Army during World War II, 8 million of which were
non-Slavic minorities.
[.]

The USSR suffered greatly in the war,
losing around 20 million people (modern Russian sources put the number at 26.6 million).
This includes 8.7 million military deaths. The majority of the losses were ethnic
Russians
Russians ( ) are an East Slavs, East Slavic ethnic group native to Eastern Europe. Their mother tongue is Russian language, Russian, the most spoken Slavic languages, Slavic language. The majority of Russians adhere to Eastern Orthodox Church ...
, followed by ethnic
Ukrainians
Ukrainians (, ) are an East Slavs, East Slavic ethnic group native to Ukraine. Their native tongue is Ukrainian language, Ukrainian, and the majority adhere to Eastern Orthodox Church, Eastern Orthodoxy, forming the List of contemporary eth ...
.
Approximately 2.8 million
Soviet POWs died of starvation, mistreatment, or executions in just eight months of 1941–42. More than 2 million people were killed in
Belarus
Belarus, officially the Republic of Belarus, is a landlocked country in Eastern Europe. It is bordered by Russia to the east and northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Belarus spans an a ...
during the three years of
German occupation, almost a quarter of the region's population, including around 550,000 Jews in the
Holocaust in Belarus. During the war, the country together with the United States, the United Kingdom and China were considered the
Big Four Allied powers, and later became the
Four Policemen that formed the basis of the
United Nations Security Council
The United Nations Security Council (UNSC) is one of the six principal organs of the United Nations (UN) and is charged with ensuring international peace and security, recommending the admission of new UN members to the General Assembly, an ...
. It emerged as a superpower in the post-war period. Once denied
diplomatic recognition
Diplomatic recognition in international law is a unilateral declarative political act of a state that acknowledges an act or status of another state or government in control of a state (may be also a recognized state). Recognition can be acc ...
by the Western world, the USSR had official relations with practically every country by the late 1940s. A member of the United Nations at its foundation in 1945, the country
became one of the
five permanent members of the
United Nations Security Council
The United Nations Security Council (UNSC) is one of the six principal organs of the United Nations (UN) and is charged with ensuring international peace and security, recommending the admission of new UN members to the General Assembly, an ...
, which gave it the right to veto any of its resolutions.
The USSR, in fulfillment of its agreement with the Allies at the
Yalta Conference
The Yalta Conference (), held 4–11 February 1945, was the World War II meeting of the heads of government of the United States, the United Kingdom, and the Soviet Union to discuss the postwar reorganization of Germany and Europe. The three sta ...
, broke the Soviet–Japanese Neutrality Pact in April 1945 which Japan had been honoring despite their alliance with Germany,
[Denunciation of the neutrality pact](_blank)
5 April 1945. ( Avalon Project at Yale University
Yale University is a Private university, private Ivy League research university in New Haven, Connecticut, United States. Founded in 1701, Yale is the List of Colonial Colleges, third-oldest institution of higher education in the United Stat ...
) and
invaded Manchukuo and other Japan-controlled territories on 9 August 1945.
[Soviet Declaration of War on Japan](_blank)
, 8 August 1945. ( Avalon Project at Yale University
Yale University is a Private university, private Ivy League research university in New Haven, Connecticut, United States. Founded in 1701, Yale is the List of Colonial Colleges, third-oldest institution of higher education in the United Stat ...
) This conflict ended with a decisive Soviet victory, contributing to the unconditional
surrender of Japan
The surrender of the Empire of Japan in World War II was Hirohito surrender broadcast, announced by Emperor Hirohito on 15 August and formally Japanese Instrument of Surrender, signed on 2 September 1945, End of World War II in Asia, ending ...
and the end of World War II.
Soviet soldiers committed mass rapes in occupied territories, especially in
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
. The
wartime rapes were followed by decades of silence.
According to historian
Antony Beevor, whose books were banned in 2015 from some Russian schools and colleges,
NKVD
The People's Commissariat for Internal Affairs (, ), abbreviated as NKVD (; ), was the interior ministry and secret police of the Soviet Union from 1934 to 1946. The agency was formed to succeed the Joint State Political Directorate (OGPU) se ...
(Soviet secret police) files have revealed that the leadership knew what was happening, but did little to stop it.
It was often
rear echelon units who committed the rapes. According to professor Oleg Rzheshevsky, "4,148 Red Army officers and many privates were punished for committing atrocities".
[Television documentary from CC&C Ideacom Production, "Apocalypse Never-Ending War 1918–1926", part 2, aired at Danish DR K on 22 October 2018.] The exact number of German women and girls raped by Soviet troops during the war and occupation is uncertain, but historians estimate their numbers are likely in the hundreds of thousands, and possibly as many as two million.
The Soviet Union was greatly assisted in its wartime effort by the United States via
Lend-Lease
Lend-Lease, formally the Lend-Lease Act and introduced as An Act to Promote the Defense of the United States (),3,000 Hurricanes and >4,000 other aircraft)
* 28 naval vessels:
** 1 Battleship. (HMS Royal Sovereign (05), HMS Royal Sovereign)
* ...
. In total, the U.S. deliveries to the USSR through Lend-Lease amounted to $11
billion
Billion is a word for a large number, and it has two distinct definitions:
* 1,000,000,000, i.e. one thousand million, or (ten to the ninth power), as defined on the short scale. This is now the most common sense of the word in all varieties of ...
in materials: over 400,000
jeep
Jeep is an American automobile brand, now owned by multi-national corporation Stellantis. Jeep has been part of Chrysler since 1987, when Chrysler acquired the Jeep brand, along with other assets, from its previous owner, American Motors Co ...
s and trucks; 12,000
armored vehicle
Military vehicles are commonly armoured (or armored; see spelling differences) to withstand the impact of shrapnel, bullets, shells, rockets, and missiles, protecting the personnel inside from enemy fire. Such vehicles include armoured fighti ...
s (including 7,000 tanks, about 1,386 of which were
M3 Lees and 4,102
M4 Shermans); 11,400 aircraft (of which 4,719 were
Bell P-39 Airacobras, 3,414 were
Douglas A-20 Havocs and 2,397 were
Bell P-63 Kingcobras) and 1.75 million tons of food. As Soviet soldiers were bearing the brunt of the war, Roosevelt's advisor
Harry Hopkins
Harold Lloyd Hopkins (August 17, 1890 – January 29, 1946) was an American statesman, public administrator, and presidential advisor. A trusted deputy to President Franklin Delano Roosevelt, Hopkins directed New Deal relief programs before ser ...
felt that American aid to the Soviets would hasten the war's conclusion.
Roughly 17.5 million tons of military equipment, vehicles, industrial supplies, and food were shipped from the Western Hemisphere to the USSR, 94% coming from the US. For comparison, a total of 22 million tons landed in Europe to supply American forces from January 1942 to May 1945. It has been estimated that American deliveries to the USSR through the Persian Corridor alone were sufficient, by US Army standards, to maintain sixty combat divisions in the line.
Cold War

During the immediate post-war period, the Soviet Union rebuilt and expanded its economy, while maintaining its
strictly centralized control. It took effective control over most of the countries of Eastern Europe (except
Yugoslavia
, common_name = Yugoslavia
, life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation
, p1 = Kingdom of SerbiaSerbia
, flag_p ...
and later
Albania
Albania ( ; or ), officially the Republic of Albania (), is a country in Southeast Europe. It is located in the Balkans, on the Adriatic Sea, Adriatic and Ionian Seas within the Mediterranean Sea, and shares land borders with Montenegro to ...
), turning them into
satellite state
A satellite state or dependent state is a country that is formally independent but under heavy political, economic, and military influence or control from another country. The term was coined by analogy to planetary objects orbiting a larger ob ...
s. The USSR bound its satellite states in a military alliance, the
Warsaw Pact
The Warsaw Pact (WP), formally the Treaty of Friendship, Co-operation and Mutual Assistance (TFCMA), was a Collective security#Collective defense, collective defense treaty signed in Warsaw, Polish People's Republic, Poland, between the Sovi ...
, in 1955, and an economic organization, Council for Mutual Economic Assistance or
Comecon
The Council for Mutual Economic Assistance, often abbreviated as Comecon ( ) or CMEA, was an economic organization from 1949 to 1991 under the leadership of the Soviet Union that comprised the countries of the Eastern Bloc#List of states, Easter ...
, a counterpart to the
European Economic Community
The European Economic Community (EEC) was a regional organisation created by the Treaty of Rome of 1957,Today the largely rewritten treaty continues in force as the ''Treaty on the functioning of the European Union'', as renamed by the Lisbo ...
(EEC), from 1949 to 1991.
Although nominally a "defensive" alliance, the Warsaw Pact's primary function was to safeguard the
Soviet Union's hegemony over its
Eastern European
Eastern Europe is a subregion of the European continent. As a largely ambiguous term, it has a wide range of geopolitical, geographical, ethnic, cultural and socio-economic connotations. Its eastern boundary is marked by the Ural Mountains, and ...
satellites, with the Pact's only direct military actions having been the invasions of its own member states to keep them from breaking away.
The USSR concentrated on its own recovery, seizing and transferring most of Germany's industrial plants, and it exacted
war reparations from
East Germany
East Germany, officially known as the German Democratic Republic (GDR), was a country in Central Europe from Foundation of East Germany, its formation on 7 October 1949 until German reunification, its reunification with West Germany (FRG) on ...
,
Hungary
Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
,
Romania
Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...
, and
Bulgaria
Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...
using Soviet-dominated joint enterprises. It also instituted trading arrangements deliberately designed to favour the country. Moscow controlled the Communist parties that ruled the satellite states, and they followed orders from the Kremlin. Historian Mark Kramer concludes: "The net outflow of resources from eastern Europe to the Soviet Union was approximately $15 billion to $20 billion in the first decade after World War II, an amount roughly equal to the total aid provided by the United States to western Europe under the
Marshall Plan
The Marshall Plan (officially the European Recovery Program, ERP) was an American initiative enacted in 1948 to provide foreign aid to Western Europe. The United States transferred $13.3 billion (equivalent to $ in ) in economic recovery pr ...
." Later, the Comecon supplied aid to the eventually victorious
Chinese Communist Party
The Communist Party of China (CPC), also translated into English as Chinese Communist Party (CCP), is the founding and One-party state, sole ruling party of the People's Republic of China (PRC). Founded in 1921, the CCP emerged victorious in the ...
, and its influence grew elsewhere in the world. Fearing its ambitions, the Soviet Union's wartime allies, the United Kingdom and the United States, became its enemies. In the ensuing Cold War, the two sides clashed indirectly in
proxy war
In political science, a proxy war is an armed conflict where at least one of the belligerents is directed or supported by an external third-party power. In the term ''proxy war'', a belligerent with external support is the ''proxy''; both bel ...
s.
Khrushchev Thaw (1953–1964)
Stalin died on 5 March 1953. Without a mutually agreeable successor, the highest Communist Party officials initially opted to rule the Soviet Union jointly through a troika headed by
Georgy Malenkov
Georgy Maximilianovich Malenkov (8 January 1902 O.S. 26 December 1901">Old_Style_and_New_Style_dates.html" ;"title="/nowiki>Old Style and New Style dates">O.S. 26 December 1901ref name=":6"> – 14 January 1988) was a Soviet politician who br ...
. This did not last, however, and
Nikita Khrushchev
Nikita Sergeyevich Khrushchev (– 11 September 1971) was the General Secretary of the Communist Party of the Soviet Union, First Secretary of the Communist Party of the Soviet Union from 1953 to 1964 and the Premier of the Soviet Union, Chai ...
eventually won the ensuing power struggle by the mid-1950s. In 1956, he
denounced Joseph Stalin and proceeded to ease controls over the party and society. This was known as
de-Stalinization
De-Stalinization () comprised a series of political reforms in the Soviet Union after Death and state funeral of Joseph Stalin, the death of long-time leader Joseph Stalin in 1953, and Khrushchev Thaw, the thaw brought about by ascension of Nik ...
.
Moscow considered Eastern Europe to be a critically vital buffer zone for the forward defence of its western borders, in case of another major invasion such as the German invasion of 1941. For this reason, the USSR sought to cement its control of the region by transforming the Eastern European countries into satellite states, dependent upon and subservient to its leadership. As a result, Soviet military forces were used to suppress an anti-communist uprising in
Hungary
Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
in 1956.
In the late 1950s, a confrontation with China regarding the Soviet rapprochement with the West, and what
Mao Zedong
Mao Zedong pronounced ; traditionally Romanization of Chinese, romanised as Mao Tse-tung. (26December 18939September 1976) was a Chinese politician, revolutionary, and political theorist who founded the People's Republic of China (PRC) in ...
perceived as Khrushchev's
revisionism, led to the
Sino–Soviet split. This resulted in a break throughout the global Marxist–Leninist movement, with the governments in
Albania
Albania ( ; or ), officially the Republic of Albania (), is a country in Southeast Europe. It is located in the Balkans, on the Adriatic Sea, Adriatic and Ionian Seas within the Mediterranean Sea, and shares land borders with Montenegro to ...
,
Cambodia
Cambodia, officially the Kingdom of Cambodia, is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. It is bordered by Thailand to the northwest, Laos to the north, and Vietnam to the east, and has a coastline ...
, and
Somalia
Somalia, officially the Federal Republic of Somalia, is the easternmost country in continental Africa. The country is located in the Horn of Africa and is bordered by Ethiopia to the west, Djibouti to the northwest, Kenya to the southwest, th ...
choosing to ally with China.
During this period of the late 1950s and early 1960s, the USSR continued to realize scientific and technological exploits in the
Space Race
The Space Race (, ) was a 20th-century competition between the Cold War rivals, the United States and the Soviet Union, to achieve superior spaceflight capability. It had its origins in the ballistic missile-based nuclear arms race between t ...
, rivaling the United States: launching the first artificial satellite,
Sputnik 1
Sputnik 1 (, , ''Satellite 1''), sometimes referred to as simply Sputnik, was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program ...
in 1957; a living dog named
Laika in 1957; the first human being,
Yuri Gagarin in 1961; the first woman in space,
Valentina Tereshkova
Valentina Vladimirovna Tereshkova (born 6 March 1937) is a Russian engineer, member of the State Duma, and former Soviet cosmonaut. She was the first Women in space, woman in space, having flown a solo mission on Vostok 6 on 16 June 1963. S ...
in 1963;
Alexei Leonov, the first person to walk in space in 1965; the first soft landing on the Moon by spacecraft
Luna 9
Luna 9 (Луна-9), internal designation Ye-6 No.13, was an uncrewed space mission of the Soviet Union's Luna programme. On 3 February 1966, the Luna 9 spacecraft became the first spacecraft to achieve a soft landing on the Moon and return ima ...
in 1966; and the first Moon rovers,
Lunokhod 1
''Lunokhod 1'' (Russian language, Russian: Луноход-1 "Moonwalker 1"), also known as Аппарат 8ЕЛ № 203 ("Device 8EL No. 203") was the first rover (space exploration), robotic rover lunar rover, on the Moon and the first to freel ...
and
Lunokhod 2
''Lunokhod 2'' ( ("Moonwalker 2"), also known as Аппарат 8ЕЛ № 204 ("Device 8EL No. 204")) was the second of two uncrewed space mission, uncrewed lunar rover (space exploration), rovers that landed on the Moon by the Soviet Union as ...
.
Khrushchev initiated '
The Thaw', a complex shift in political, cultural, and economic life in the country. This included some openness and contact with other nations and new social and economic policies with more emphasis on commodity goods, allowing a dramatic rise in living standards while maintaining high levels of economic growth. Censorship was relaxed as well. Khrushchev's reforms in agriculture and administration, however, were generally unproductive. In 1962, he precipitated a
crisis with the United States over the Soviet deployment of
nuclear missiles in
Cuba
Cuba, officially the Republic of Cuba, is an island country, comprising the island of Cuba (largest island), Isla de la Juventud, and List of islands of Cuba, 4,195 islands, islets and cays surrounding the main island. It is located where the ...
. An agreement was made with the United States to remove nuclear missiles from both
Cuba
Cuba, officially the Republic of Cuba, is an island country, comprising the island of Cuba (largest island), Isla de la Juventud, and List of islands of Cuba, 4,195 islands, islets and cays surrounding the main island. It is located where the ...
and
Turkey
Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...
, concluding the crisis. This event caused Khrushchev much embarrassment and loss of prestige, resulting in his removal from power in 1964.
Era of Stagnation (1964–1982)

The history of the Soviet Union from 1964 to 1982, referred to as the Brezhnev Era, covers the period of
Leonid Brezhnev
Leonid Ilyich Brezhnev (19 December 190610 November 1982) was a Soviet politician who served as the General Secretary of the Communist Party of the Soviet Union from 1964 until Death and state funeral of Leonid Brezhnev, his death in 1982 as w ...
's rule of the
Union of Soviet Socialist Republics
The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a transcontinental country that spanned much of Eurasia from 1922 until it dissolved in 1991. During its existence, it was the largest country by are ...
(USSR). This period began with high economic growth and soaring prosperity but ended with a much weaker Soviet Union facing social, political, and economic stagnation. The average annual income stagnated because needed economic reforms were never fully carried out.
Following the ousting of
Nikita Khrushchev
Nikita Sergeyevich Khrushchev (– 11 September 1971) was the General Secretary of the Communist Party of the Soviet Union, First Secretary of the Communist Party of the Soviet Union from 1953 to 1964 and the Premier of the Soviet Union, Chai ...
on 14 October 1964, Brezhnev replaced him as
First Secretary, and
Alexei Kosygin
Alexei Nikolayevich Kosygin (–18 December 1980) was a Soviet people, Soviet statesman during the Cold War. He served as the Premier of the Soviet Union from 1964 to 1980 and, alongside General Secretary Leonid Brezhnev, was one of its most ...
took over as Chairman of the Council of Ministers.
Anastas Mikoyan, and later
Nikolai Podgorny, became Chairmen of the
Presidium of the Supreme Soviet
The Presidium of the Supreme Soviet () was the standing body of the highest organ of state power, highest body of state authority in the Union of Soviet Socialist Republics (USSR).The Presidium of the Soviet Union is, in short, the legislativ ...
. Alongside
Andrei Kirilenko
Andrei Gennadyevich Kirilenko (; born February 18, 1981), nicknamed AK-47, is a Russian basketball executive and former professional basketball player.
At age fifteen, Kirilenko began playing professional basketball in the Russian Basketball ...
as organisational secretary, and
Mikhail Suslov as chief ideologue, this group formed a reinvigorated
collective leadership
In communist and socialist theory, collective leadership is a shared distribution of power within an organizational structure, sometimes publicly described or designed as Primus inter pares, ''primus inter pares'' (''first among equals'').
Commun ...
, which contrasted in form with the autocracy that characterized Khrushchev's rule.
The collective leadership initially focused on stabilizing the Soviet Union and calming
Soviet society. They also sought to accelerate economic growth, which had slowed considerably during Khrushchev's final years in power. In 1965, Kosygin initiated several economic reforms aimed at decentralizing the Soviet economy. These reforms initially spurred economic growth, but hard-liners within the Party halted them, fearing that they would undermine the Party's prestige and power. As a result, no further radical economic reforms were implemented during the Brezhnev era, leading to economic stagnation by the early-to-mid-1970s. By Brezhnev's death in 1982, Soviet economic growth had nearly come to a standstill.
During this period, Brezhnev consolidated power, and by the early 1970s, he had established himself as the preeminent Soviet leader. The stabilization policy established a ruling
gerontocracy
A gerontocracy is a form of rule in which an entity is ruled by leaders who are substantially older than most of the adult population.
In many political structures, power within the ruling class accumulates with age, making the oldest individu ...
, and
political corruption
Political corruption is the use of powers by government officials or their network contacts for illegitimate private gain. Forms of corruption vary but can include bribery, lobbying, extortion, cronyism, nepotism, parochialism, patronage, influen ...
became increasingly prevalent. Despite this, Brezhnev never launched any large-scale anti-corruption campaigns. The Soviet Union, thanks to the military buildup of the 1960s, solidified its status as a
superpower
Superpower describes a sovereign state or supranational union that holds a dominant position characterized by the ability to Sphere of influence, exert influence and Power projection, project power on a global scale. This is done through the comb ...
during Brezhnev's rule. However, this era was also marked by the
Era of Stagnation
The "Era of Stagnation" (, or ) is a term coined by Mikhail Gorbachev in order to describe the negative way in which he viewed the economic, political, and social policies of the Soviet Union that began during the rule of Leonid Brezhnev (1964 ...
, a period characterized by economic, political, and social decline, which persisted under Brezhnev's successors,
Yuri Andropov
Yuri Vladimirovich Andropov ( – 9 February 1984) was a Soviet politician who served as the General Secretary of the Communist Party of the Soviet Union from late 1982 until his death in 1984. He previously served as the List of Chairmen of t ...
and
Konstantin Chernenko
Konstantin Ustinovich Chernenko ( – 10 March 1985) was a Soviet politician who served as the General Secretary of the Communist Party of the Soviet Union from 1984 until his death a year later.
Born to a poor family in Siberia, Chernenko jo ...
.
The Brezhnev Era also witnessed significant international actions, including the 1968
Warsaw Pact invasion of Czechoslovakia
On 20–21 August 1968, the Czechoslovak Socialist Republic was jointly invaded by four fellow Warsaw Pact countries: the Soviet Union, the Polish People's Republic, the People's Republic of Bulgaria, and the Hungarian People's Republic. The ...
to suppress the
Prague Spring
The Prague Spring (; ) was a period of liberalization, political liberalization and mass protest in
the Czechoslovak Socialist Republic. It began on 5 January 1968, when reformist Alexander Dubček was elected Secretary (title), First Secre ...
reforms. Brezhnev justified this and future interventions with the
Brezhnev Doctrine, which stated that any threat to Soviet rule in a Warsaw Pact state was a threat to all Warsaw Pact states, thus justifying military intervention.
Brezhnev presided over a period of ''
détente'' with the West, leading to treaties on arms control such as
SALT I,
SALT II, and the
Anti-Ballistic Missile Treaty, while simultaneously building up Soviet military might. In 1977, the
third Soviet Constitution was unanimously adopted. One of the Soviet economy's key strengths during this period was its vast oil and gas reserves. The quadrupling of world oil prices during the
1973 oil crisis
In October 1973, the Organization of Arab Petroleum Exporting Countries (OAPEC) announced that it was implementing a total oil embargo against countries that had supported Israel at any point during the 1973 Yom Kippur War, which began after Eg ...
and another rise in the late 1970s made the energy sector the chief driver of the Soviet economy. This revenue was used to offset multiple economic weaknesses. Former Soviet Premier
Alexei Kosygin
Alexei Nikolayevich Kosygin (–18 December 1980) was a Soviet people, Soviet statesman during the Cold War. He served as the Premier of the Soviet Union from 1964 to 1980 and, alongside General Secretary Leonid Brezhnev, was one of its most ...
once remarked that "things are bad with bread. Give me 3 million tons
f oilover the plan." The revenue from oil exports helped to mitigate a growing food supply crisis, fund the import of equipment and consumer goods, and sustain the arms race with the US. It also underpinned risky foreign policy actions, such as the
Soviet–Afghan War
The Soviet–Afghan War took place in the Democratic Republic of Afghanistan from December 1979 to February 1989. Marking the beginning of the 46-year-long Afghan conflict, it saw the Soviet Union and the Armed Forces of the Democratic Republic o ...
beginning in 1979, which effectively ended the period of détente with the West.
The long period of Brezhnev's rule culminated in his death on 10 November 1982. By this time, the Soviet Union had become increasingly stagnant, with an ageing leadership resistant to change and a deteriorating economy. Moreover, the Soviet Union's failure to modernize its economy, particularly in the field of computerization, further hindered its competitiveness with Western powers.
Reforms and dissolution (1982–1991)
Two developments dominated the decade that followed: the increasingly apparent crumbling of the Soviet Union's economic and political structures, and the patchwork attempts at reforms to reverse that process. Kenneth S. Deffeyes argued in ''
Beyond Oil'' that the
Reagan administration
Ronald Reagan's tenure as the 40th president of the United States began with his first inauguration on January 20, 1981, and ended on January 20, 1989. Reagan, a Republican from California, took office following his landslide victory over ...
encouraged
Saudi Arabia
Saudi Arabia, officially the Kingdom of Saudi Arabia (KSA), is a country in West Asia. Located in the centre of the Middle East, it covers the bulk of the Arabian Peninsula and has a land area of about , making it the List of Asian countries ...
to
lower the price of oil to the point where the Soviets could not make a profit selling their oil, and resulted in the depletion of the country's
hard currency
In macroeconomics, hard currency, safe-haven currency, or strong currency is any globally traded currency that serves as a reliable and stable store of value. Factors contributing to a currency's ''hard'' status might include the stability and ...
reserves.
Brezhnev's next two successors, transitional figures with deep roots in his tradition, did not last long.
Yuri Andropov
Yuri Vladimirovich Andropov ( – 9 February 1984) was a Soviet politician who served as the General Secretary of the Communist Party of the Soviet Union from late 1982 until his death in 1984. He previously served as the List of Chairmen of t ...
was 68 years old and
Konstantin Chernenko
Konstantin Ustinovich Chernenko ( – 10 March 1985) was a Soviet politician who served as the General Secretary of the Communist Party of the Soviet Union from 1984 until his death a year later.
Born to a poor family in Siberia, Chernenko jo ...
72 when they assumed power; both died in less than two years. In an attempt to avoid a third short-lived leader, in 1985, the Soviets turned to the next generation and selected
Mikhail Gorbachev
Mikhail Sergeyevich Gorbachev (2 March 1931 – 30 August 2022) was a Soviet and Russian politician who served as the last leader of the Soviet Union from 1985 to dissolution of the Soviet Union, the country's dissolution in 1991. He served a ...
. In addition to the failing economy, the prolonged war in Afghanistan led to increased public dissatisfaction with the Communist government.
In the
Chernobyl disaster
On 26 April 1986, the no. 4 reactor of the Chernobyl Nuclear Power Plant, located near Pripyat, Ukrainian Soviet Socialist Republic, Ukrainian SSR, Soviet Union (now Ukraine), exploded. With dozens of direct casualties, it is one of only ...
of 26 April 1986, at the
Chernobyl Nuclear Power Plant in
Pripyat
Pripyat, also known as Prypiat, is an abandoned industrial city in Kyiv Oblast, Ukraine, located near the border with Belarus. Named after the nearby river, Pripyat (river), Pripyat, it was founded on 4 February 1970 as the ninth ''atomgrad'' ...
, Ukraine, one of the plant's
nuclear reactors
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction. They are used for commercial electricity, marine propulsion, weapons production and research. Fissile nuclei (primarily uranium-235 or plutonium-2 ...
exploded, spreading
radioactive contaminants across Europe and forcing tens of thousands of people to permanently evacuate from the
Chernobyl Exclusion Zone
The Chernobyl Nuclear Power Plant Zone of Alienation, also called the 30-Kilometre Zone or simply The Zone, was established shortly after the 1986 Chernobyl disaster in the Ukrainian SSR of the Soviet Union.
Initially, Soviet authorities declar ...
around Pripyat. At least two dozen people died from being at the plant and many more died from
radiation exposure.
The Chernobyl disaster added motive force to Gorbachev's reforms.
He made significant changes in the economy and party leadership, called ''
perestroika
''Perestroika'' ( ; rus, перестройка, r=perestrojka, p=pʲɪrʲɪˈstrojkə, a=ru-perestroika.ogg, links=no) was a political reform movement within the Communist Party of the Soviet Union (CPSU) during the late 1980s, widely associ ...
''. His policy of ''
glasnost
''Glasnost'' ( ; , ) is a concept relating to openness and transparency. It has several general and specific meanings, including a policy of maximum openness in the activities of state institutions and freedom of information and the inadmissi ...
'' freed public
access to information after decades of heavy government censorship. Gorbachev also moved to end the Cold War. In 1988, the USSR abandoned its
war in Afghanistan
War in Afghanistan, Afghan war, or Afghan civil war may refer to:
*Conquest of Afghanistan by Alexander the Great (330 BC – 327 BC), the conquest of Afghanistan by the Macedonian Empire
* Muslim conquests of Afghanistan, a series of campaigns in ...
and began to withdraw its forces. In the following year,
Gorbachev refused to interfere in the internal affairs of the Soviet satellite states, which paved the way for the
Revolutions of 1989
The revolutions of 1989, also known as the Fall of Communism, were a revolutionary wave of liberal democracy movements that resulted in the collapse of most Communist state, Marxist–Leninist governments in the Eastern Bloc and other parts ...
. In particular, the standstill of the Soviet Union at the
Pan-European Picnic in August 1989 then set a peaceful chain reaction in motion, at the end of which the Eastern Bloc collapsed. With the tearing down of the
Berlin Wall
The Berlin Wall (, ) was a guarded concrete Separation barrier, barrier that encircled West Berlin from 1961 to 1989, separating it from East Berlin and the East Germany, German Democratic Republic (GDR; East Germany). Construction of the B ...
and with East and West Germany pursuing re-unification, the
Iron Curtain
The Iron Curtain was the political and physical boundary dividing Europe into two separate areas from the end of World War II in 1945 until the end of the Cold War in 1991. On the east side of the Iron Curtain were countries connected to the So ...
between
the West and Soviet-occupied regions came down.At the same time, the Soviet republics started legal moves towards potentially declaring
sovereignty
Sovereignty can generally be defined as supreme authority. Sovereignty entails hierarchy within a state as well as external autonomy for states. In any state, sovereignty is assigned to the person, body or institution that has the ultimate au ...
over their territories, citing the freedom to secede in Article 72 of the USSR constitution. On 7 April 1990, a law was passed allowing a republic to secede if more than two-thirds of its residents voted for it in a referendum. Many held their first free elections in the Soviet era for their own national legislatures in 1990. Many of these legislatures proceeded to produce legislation contradicting the Union laws in what was known as the '
War of Laws'. In 1989, the
Russian SFSR
The Russian Soviet Federative Socialist Republic (Russian SFSR or RSFSR), previously known as the Russian Socialist Federative Soviet Republic and the Russian Soviet Republic, and unofficially as Soviet Russia,Declaration of Rights of the labo ...
convened a newly elected Congress of People's Deputies.
Boris Yeltsin
Boris Nikolayevich Yeltsin (1 February 1931 – 23 April 2007) was a Soviet and Russian politician and statesman who served as President of Russia from 1991 to 1999. He was a member of the Communist Party of the Soviet Union (CPSU) from 1961 to ...
was elected its chairman. On 12 June 1990, the Congress
declared Russia's sovereignty over its territory and proceeded to pass laws that attempted to supersede some of the Soviet laws. After a landslide victory of
Sąjūdis in Lithuania, that country declared its independence restored on 11 March 1990, citing the illegality of the
Soviet occupation of the Baltic states. Soviet forces attempted to halt the secession by crushing popular demonstrations in Lithuania (
Bloody Sunday) and Latvia (
The Barricades
The Barricades () were a series of confrontations between the Republic of Latvia and the Union of Soviet Socialist Republics in January 1991 which took place mainly in Riga. The events are named for the popular effort of building and protecting ...
), as a result of which numerous civilians were killed or wounded. However, these actions only bolstered international support for the secessionists.

A
referendum for the preservation of the USSR was held on 17 March 1991 in nine republics (the remainder having boycotted the vote), with the majority of the population in those republics voting for preservation of the Union in the form of a new federation. The referendum gave Gorbachev a minor boost. In the summer of 1991, the
New Union Treaty, which would have turned the country into a much looser Union, was agreed upon by eight republics. The signing of the treaty, however, was interrupted by the
August Coup
The 1991 Soviet coup attempt, also known as the August Coup, was a failed attempt by hardliners of the Communist Party of the Soviet Union (CPSU) to Coup d'état, forcibly seize control of the country from Mikhail Gorbachev, who was President ...
—an attempted coup d'état by hardline members of the government and the KGB who sought to reverse Gorbachev's reforms and reassert the central government's control over the republics. After the coup collapsed, Russian president Yeltsin was seen as a hero for his decisive actions, while Gorbachev's power was effectively ended. The balance of power tipped significantly towards the republics. In August 1991, Latvia and Estonia immediately declared the restoration of their full independence (following Lithuania's 1990 example). Gorbachev resigned as general secretary in late August, and soon afterwards, the party's activities were indefinitely suspended—effectively ending its rule. By the fall, Gorbachev could no longer influence events outside Moscow, and he was being challenged even there by Yeltsin, who had been elected
President of Russia
The president of Russia, officially the president of the Russian Federation (), is the executive head of state of Russia. The president is the chair of the State Council (Russia), Federal State Council and the President of Russia#Commander-in-ch ...
in July 1991.
Dissolution and aftermath

The remaining 12 republics continued discussing new, increasingly looser, models of the Union. However, by December all except Russia and
Kazakhstan
Kazakhstan, officially the Republic of Kazakhstan, is a landlocked country primarily in Central Asia, with a European Kazakhstan, small portion in Eastern Europe. It borders Russia to the Kazakhstan–Russia border, north and west, China to th ...
had formally declared independence. During this time, Yeltsin took over what remained of the Soviet government, including the
Moscow Kremlin
The Moscow Kremlin (also the Kremlin) is a fortified complex in Moscow, Russia. Located in the centre of the country's capital city, the Moscow Kremlin comprises five palaces, four cathedrals, and the enclosing Kremlin Wall along with the K ...
. The final blow was struck on 1 December when Ukraine, the second-most powerful republic,
voted overwhelmingly for independence. Ukraine's secession ended any realistic chance of the country staying together even on a limited scale.
On 8 December 1991, the presidents of Russia, Ukraine and
Belarus
Belarus, officially the Republic of Belarus, is a landlocked country in Eastern Europe. It is bordered by Russia to the east and northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Belarus spans an a ...
(formerly Byelorussia), signed the
Belavezha Accords, which declared the Soviet Union dissolved and established the
Commonwealth of Independent States
The Commonwealth of Independent States (CIS) is a regional organization, regional intergovernmental organization in Eurasia. It was formed following the dissolution of the Soviet Union, dissolution of the Soviet Union in 1991. It covers an ar ...
(CIS) in its place. While doubts remained over the authority of the accords to do this, on 21 December 1991, the representatives of all Soviet republics except
Georgia
Georgia most commonly refers to:
* Georgia (country), a country in the South Caucasus
* Georgia (U.S. state), a state in the southeastern United States
Georgia may also refer to:
People and fictional characters
* Georgia (name), a list of pe ...
signed the
Alma-Ata Protocol, which confirmed the accords. On 25 December 1991, Gorbachev resigned as the President of the USSR, declaring the office extinct. He turned the powers that had been vested in the presidency over to Yeltsin. That night, the Soviet flag was lowered for the last time, and the
Russian tricolour was raised in its place.
The following day, the
Supreme Soviet
The Supreme Soviet () was the common name for the legislative bodies (parliaments) 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, establ ...
, the highest governmental body, voted both itself and the country out of existence. This is generally recognized as marking the official, final
dissolution of the Soviet Union
The Soviet Union was formally dissolved as a sovereign state and subject of international law on 26 December 1991 by Declaration No. 142-N of the Soviet of the Republics of the Supreme Soviet of the Soviet Union. Declaration No. 142-Н of ...
as a functioning state, and the end of the Cold War. The Soviet Army initially remained under overall CIS command but was soon absorbed into the different military forces of the newly independent states. The few remaining Soviet institutions that had not been taken over by Russia ceased to function by the end of 1991.
Following the dissolution, Russia was internationally recognized
[Country Profile: Russia](_blank)
Foreign & Commonwealth Office of the United Kingdom. as the USSR's
legal successor on the international stage. To that end, Russia voluntarily accepted all Soviet foreign debt and claimed Soviet overseas properties as its own. Under the 1992
Lisbon Protocol
The Lisbon Protocol to the 1991 START I, Strategic Arms Reduction Treaty was a document signed by representatives of Russia, Belarus, Ukraine, and Kazakhstan that recognized the four states as successors of the Union of Soviet Socialist Republic ...
, Russia also agreed to receive all nuclear weapons remaining in the territory of other former Soviet republics. Since then, the Russian Federation has
assumed the Soviet Union's rights and obligations, and is widely viewed as the USSR's successor state.
Ukraine
Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...
has refused to recognize exclusive Russian claims to succession of the USSR and claimed such status for Ukraine as well, which was codified in Articles 7 and 8 of its 1991 law
On Legal Succession of Ukraine. Since its independence in 1991, Ukraine has continued to pursue claims against Russia in foreign courts, seeking to recover its share of the foreign property that was owned by the USSR.
In summing up the international ramifications of these events,
Vladislav Zubok stated: 'The collapse of the
Soviet empire was an event of epochal geopolitical, military, ideological, and economic significance.' Before the dissolution, the country had maintained its status as one of the world's two superpowers for four decades after World War II through its hegemony in Eastern Europe, military strength, economic strength and scientific research, especially in space technology and weaponry.
Post-Soviet states

The analysis of the
succession of states
Succession of states is a concept in international relations regarding a successor state that has become a sovereign state over a territory (and populace) that was previously under the sovereignty of another state. The theory has its roots in 19 ...
for the 15 post-Soviet states is complex. The Russian Federation is widely seen as the legal ''continuator'' state and is for most purposes the heir to the Soviet Union. It retained ownership of all former Soviet embassy properties, inheriting the full
Soviet nuclear arsenal, and also inherited the
Soviet Union's UN membership, with its permanent seat on the
Security Council.
Of the two other co-founding states of the USSR at the time of the dissolution,
Ukraine
Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...
was the only one that had passed laws, similar to Russia, claiming it is a state-successor of both the
Ukrainian SSR
The Ukrainian Soviet Socialist Republic, abbreviated as the Ukrainian SSR, UkrSSR, and also known as Soviet Ukraine or just Ukraine, was one of the Republics of the Soviet Union, constituent republics of the Soviet Union from 1922 until 1991. ...
and the USSR. Soviet treaties laid groundwork for Ukraine's future foreign agreements as well as leading to the country agreeing to undertake 16.37% of debts of the Soviet Union for which it was going to receive its share of the USSR's foreign property. Russia's position as the 'only continuation of the USSR' that became widely accepted in the West, as well as constant pressure from the Western countries, allowed Russia to inherit Soviet state property abroad and conceal information about it. Due to that Ukraine never ratified 'zero option' agreement that Russian Federation had signed with other former Soviet republics, as it denied disclosing of information about Soviet Gold Reserves and its Diamond Fund. The dispute over former Soviet property and assets between the two former republics is still ongoing:
Similar situation occurred with restitution of cultural property. Although on 14 February 1992 Russia and other former Soviet republics signed agreement 'On the return of cultural and historic property to the origin states' in
Minsk
Minsk (, ; , ) is the capital and largest city of Belarus, located on the Svislach (Berezina), Svislach and the now subterranean Nyamiha, Niamiha rivers. As the capital, Minsk has a special administrative status in Belarus and is the administra ...
, it was halted by the Russian State Duma that eventually passed '
Federal Law on Cultural Valuables Displaced to the USSR as a Result of the Second World War and Located on the Territory of the Russian Federation' which made restitution currently impossible, effectively barring the return of looted cultural heritage by Soviet troops during the Second World War to its original owners.
Estonia, Latvia, and Lithuania consider themselves as
revivals of the three independent countries that existed prior to their
occupation and annexation by the Soviet Union in 1940. They maintain that the process by which they were incorporated into the Soviet Union violated both international law and their own law, and that in 1990–1991 they were reasserting an independence that still legally existed.
Nearly all of the post-Soviet states suffered deep and prolonged
recession
In economics, a recession is a business cycle contraction that occurs when there is a period of broad decline in economic activity. Recessions generally occur when there is a widespread drop in spending (an adverse demand shock). This may be tr ...
s after
shock therapy, with poverty increasing more than tenfold. In a 2001 study by the economist
Steven Rosefielde, he calculated that there were 3.4 million premature deaths in Russia from 1990 to 1998, which he partly blames on the "shock therapy" that came with the
Washington Consensus
The Washington Consensus is a set of ten economic policy prescriptions considered in the 1980s and 1990s to constitute the "standard" reform package promoted for Economic crisis, crisis-wracked developing country, developing countries by the Was ...
.
In 2011, ''
The Guardian
''The Guardian'' is a British daily newspaper. It was founded in Manchester in 1821 as ''The Manchester Guardian'' and changed its name in 1959, followed by a move to London. Along with its sister paper, ''The Guardian Weekly'', ''The Guardi ...
'' published an analysis of the former Soviet countries twenty years after the fall of the USSR. They found that "GDP fell as much as 50 percent in the 1990s in some republics... as capital flight, industrial collapse, hyperinflation and tax avoidance took their toll," but that there was a rebound in the 2000s, and by 2010 "some economies were five times as big as they were in 1991." Life expectancy has grown since 1991 in some of the countries, but fallen in others; likewise, some held free and fair elections, while others remained authoritarian.
There are additionally three states that claim independence from the other internationally recognized post-Soviet states but
possess limited international recognition:
Abkhazia
Abkhazia, officially the Republic of Abkhazia, is a List of states with limited recognition, partially recognised state in the South Caucasus, on the eastern coast of the Black Sea, at the intersection of Eastern Europe and West Asia. It cover ...
,
South Ossetia
South Ossetia, officially the Republic of South Ossetia or the State of Alania, is a landlocked country in the South Caucasus with International recognition of Abkhazia and South Ossetia, partial diplomatic recognition. It has an offici ...
and
Transnistria
Transnistria, officially known as the Pridnestrovian Moldavian Republic and locally as Pridnestrovie, is a Landlocked country, landlocked Transnistria conflict#International recognition of Transnistria, breakaway state internationally recogn ...
. The
Armenian
Armenian may refer to:
* Something of, from, or related to Armenia, a country in the South Caucasus region of Eurasia
* Armenians, the national people of Armenia, or people of Armenian descent
** Armenian diaspora, Armenian communities around the ...
separatist movement of the
Republic of Artsakh
Artsakh ( ), officially the Republic of Artsakh or the Republic of Nagorno-Karabakh ( ), was a breakaway state in the South Caucasus whose territory was internationally recognised as part of Azerbaijan. Between 1991 and 2023, Artsakh cont ...
,
Chechen separatist movement of the
Chechen Republic of Ichkeria, the
Gagauz separatist movement of the
Gagauz Republic and the
Talysh separatist movement of the
Talysh-Mughan Autonomous Republic are other such cases which have already been resolved.
See also
*
Foreign relations of the Soviet Union
After the Russian Revolution, in which the Bolsheviks took over parts of the collapsing Russian Empire in 1918, they faced enormous odds against the German Empire and eventually negotiated terms to pull out of World War I. They then went to war ...
*
Historiography in the Soviet Union
*
Index of Soviet Union–related articles
*
Islam in the Soviet Union
*
List of Slavic studies journals
*
Ukrainian nationalism
Notes
References
Sources
*
*
*
*
*
*
*
*
*
*
*
*
External links
An on-line archive of primary source materials on Soviet history
{{Authority control
Soviet Union
The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...