The Leninist thesis that the proletariat, having seized power, can and must build socialism in its own country — even without simultaneous revolution in other states
After the October Revolution of 1917, the Soviet Republic found itself alone. The revolutionary wave that swept Europe in 1918–1923 — in Germany, Hungary, Finland, the Baltic states, and Italy — was defeated by the bourgeoisie with the assistance of social democracy. The expected world revolution did not materialise on the timescale that many Bolsheviks had anticipated.
This posed a question of immense practical and theoretical importance: could socialism be built in one country, surrounded by hostile capitalist states? Or was the Soviet Republic doomed to remain a mere holding operation, marking time until revolution broke out in the advanced capitalist countries of Western Europe?
The answer to this question was not academic. It determined the entire orientation of the Communist Party, the Soviet state, and the international communist movement. If socialism could not be built in one country, then the Soviet working class had no reason to undertake the immense sacrifices required for industrialisation and collectivisation. If the only hope lay in world revolution, then the Bolsheviks should have adopted a posture of revolutionary adventurism abroad and passive waiting at home.
"The development of capitalism proceeds extremely unevenly in different countries. It cannot be otherwise under commodity production. From this it follows irrefutably that socialism cannot achieve victory simultaneously in all countries. It will achieve victory first in one or several countries, while the others will for some time remain bourgeois or pre-bourgeois."
— V. I. Lenin, On the Slogan for a United States of Europe (1915)The theory of the possibility of socialism in one country was not invented by Stalin — it was developed by Lenin as a direct consequence of his theory of imperialism and the law of uneven development.
Lenin demonstrated that imperialism, as the highest stage of capitalism, is characterised by extreme and increasing unevenness in the economic and political development of different countries. This unevenness means that the chain of imperialism will break at its weakest link — not necessarily in the most industrially advanced country, but where the contradictions of capitalism are sharpest and the revolutionary forces are strongest.
From this analysis, Lenin drew a conclusion of enormous significance: the victory of socialism is possible first in several countries, or even in one country taken separately. This was stated explicitly in his 1915 article On the Slogan for a United States of Europe and again in 1916 in The Military Programme of the Proletarian Revolution.
Lenin's position was a decisive break from the mechanical interpretation of Marx held by the leaders of the Second International, who assumed that socialist revolution could only occur simultaneously in all or most advanced capitalist countries. Lenin showed that this interpretation ignored the new conditions created by imperialism — the uneven development that made simultaneous revolution impossible and single-country revolution not only possible but inevitable.
Lenin distinguished between two questions: (1) the victory of socialism — the seizure of power and the beginning of socialist construction, which is entirely possible in one country; and (2) the final victory of socialism — complete security against capitalist restoration, which requires the support of revolution in other countries. Trotsky deliberately conflated these two distinct questions to argue against socialist construction.
After Lenin's death in 1924, it fell to Stalin to develop and defend the theory of socialism in one country against the attacks of the Trotskyist opposition. Stalin did not merely repeat Lenin's formulations — he developed them into a comprehensive theory that provided the ideological foundation for the entire programme of socialist industrialisation and collectivisation.
In The Foundations of Leninism (1924) and Problems of Leninism (1926), Stalin formulated the question with characteristic clarity. He distinguished between two aspects:
The internal aspect: Can the working class of one country, having seized power, build a complete socialist economy? Stalin answered yes — the Soviet Union possessed all the material prerequisites: vast territory, enormous natural resources, a large and growing working class, and the political power of the proletarian dictatorship. The internal contradictions of Soviet society could be resolved by the Soviet working class through its own efforts, guided by the Communist Party.
The external aspect: Can the working class of one country guarantee itself against military intervention and capitalist restoration so long as capitalism exists in other countries? Here Stalin acknowledged that complete and final guarantees against restoration were impossible while the country remained encircled by hostile capitalist powers. This danger could only be fully eliminated by the victory of revolution in at least several other countries.
But — and this was the decisive point — the external danger was not a reason to refuse to build socialism. On the contrary, it was a reason to build it faster, to strengthen the economic and military power of the Soviet state, and thereby to create the material base for resisting imperialist aggression and supporting the revolutionary movement abroad.
"We must build our economy in such a way as to prevent our country from becoming an appendage of the world capitalist system, so that it is not drawn into the general system of capitalist development as its subsidiary enterprise, so that our economy develops not as a subsidiary enterprise of world capitalism, but as an independent economic unit relying mainly on the internal market."
— J. V. Stalin, Problems of Leninism (1926)Trotsky's position was the opposite. He argued that socialism could not be built in one country — particularly not in a backward, peasant country like Russia — and that the Soviet state could survive only if revolution broke out in the advanced countries of Western Europe. Without such revolution, Trotsky maintained, the Soviet Union would inevitably succumb to internal contradictions (principally the conflict between the working class and the peasantry) or external military pressure.
This position had devastating practical implications:
It disarmed the Soviet working class. If socialism could not be built in the USSR, then the immense sacrifices required for industrialisation — the Five-Year Plans, the construction of heavy industry, the collectivisation of agriculture — were pointless. Why should workers endure hardship for a goal that was theoretically impossible?
It demanded revolutionary adventurism abroad. If the survival of the Soviet state depended entirely on revolution in other countries, then the Comintern's primary task should have been to provoke revolution at any cost, regardless of objective conditions — a policy that would have led to one defeat after another and discredited the communist movement.
It denied the role of the peasantry. Trotsky's theory of permanent revolution held that the peasantry was an inherently reactionary class incapable of supporting socialist construction. This flew in the face of the actual experience of the Russian Revolution, in which the worker-peasant alliance was the foundation of Soviet power.
It served the interests of imperialism. By insisting that socialism in the USSR was impossible, Trotsky objectively provided ideological ammunition to every enemy of the Soviet Union, from Winston Churchill to the social-democratic traitors who told workers that the Soviet experiment was doomed to failure.
Between 1928 and 1941, the Soviet Union was transformed from a backward agrarian country into the world's second industrial power. Industrial output increased by over 850%. Heavy industry — steel, coal, electricity, machinery — was built from virtually nothing. This was socialism being built in one country, not as a theoretical abstraction but as a material reality.
The industrial base created by socialist construction enabled the Soviet Union to defeat Nazi Germany — the most powerful military machine in human history. Without the Five-Year Plans, there would have been no T-34 tanks, no Katyusha rockets, no industrial capacity to outproduce the entire Axis powers. Socialism in one country saved civilisation from fascism.
By the mid-1930s, the exploiting classes had been eliminated from Soviet society. Unemployment was abolished. Universal education, healthcare, and housing were provided free. Women achieved legal equality. Illiteracy was eradicated. National minorities received their own republics, schools, and cultural institutions. All this was accomplished in one country, surrounded by enemies.
The USSR launched the first satellite, sent the first human into space, built the first nuclear power station, and developed world-leading programmes in mathematics, physics, and engineering. A country that in 1917 had been 80% illiterate peasants achieved scientific supremacy within a generation — proof that socialist planning unlocks productive forces that capitalism cannot.
The theory of socialism in one country was not merely a response to the specific conditions facing the Soviet Union in the 1920s. It embodies fundamental principles of Marxism-Leninism that remain valid today:
The law of uneven development means that revolution will continue to break out in individual countries or groups of countries, not simultaneously across the entire capitalist world. Every revolutionary movement must therefore be prepared to build socialism in its own country, relying primarily on its own resources and the strength of its own working class.
Proletarian internationalism does not mean waiting. The best service that a revolutionary state can render to the international working class is to strengthen itself, demonstrate the superiority of socialism in practice, and serve as a base of support for revolutionary movements elsewhere. The Soviet Union's very existence — its industrial achievements, its military strength, its social gains — was the most powerful argument for socialism and the most powerful material support for the international communist movement.
The peasantry is an ally, not an enemy. The worker-peasant alliance, far from being the weakness that Trotsky claimed, was the foundation of socialist construction. The collectivisation of agriculture — for all its difficulties and excesses — transformed the peasantry from a class of small individual producers into a collective social force integrated into the planned economy. This vindicated Lenin and Stalin's position and refuted Trotsky's claim that the peasantry would inevitably turn against the workers' state.
Socialism in one country is not national isolationism. The Soviet Union was the most internationalist state in history, providing material support to revolutionary and national liberation movements across the globe. But internationalism is built on strength, not weakness. A state that cannot feed, industrialise, and defend itself cannot help anyone else.
"Either we do it, or they crush us."
— V. I. Lenin, on the necessity of industrialisationThe theory of socialism in one country remains directly relevant in the twenty-first century. Cuba has maintained socialist construction for over six decades despite being 90 miles from the most powerful imperialist state on Earth. The DPRK has survived the collapse of the Soviet Union, devastating sanctions, and permanent military threat through its policy of self-reliance and independent socialist construction. These examples demonstrate that when a determined working class, led by a Marxist-Leninist party, resolves to build socialism, no amount of imperialist pressure can prevent it.
The lesson for communists in Britain, France, and elsewhere is clear: revolution in your own country is not only possible but necessary, and the task of building socialism need not wait for revolution in other countries. The international situation will always present difficulties — but difficulties are not impossibilities. The Soviet Union proved this in the most extreme conditions imaginable. The task of today's communists is to build parties capable of leading the working class to power and to begin the construction of socialism wherever that power is won.
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