Why Did the Russian Revolution of 1917 Succeed?

By February 1917 Russia had endured two and a half years of a war that was consuming the state's capacity to feed its own capital. Fuel shortages meant that some Petrograd bakeries could not even operate, and one contemporary estimate held that Moscow required 120 freight cars of grain a day to feed itself but at the start of 1917 was receiving just one-sixth of this amount, while fuel shortages meant factories could not run at capacity and bakeries could not operate. When bread rationing was announced, protest followed almost immediately: long-standing discontent with the monarchy erupted into mass protests against food rationing on February 23 Old Style (8 March New Style), with disaffected soldiers from the city's garrison joining bread rioters, primarily women in bread lines, and industrial strikers on the streets. The Tsar's government still had, on paper, overwhelming force available. The Petrograd garrison alone could call on between 150,000 and 200,000 men, enough to crush any revolution provided the garrison and its commanders remained loyal. That is exactly what did not happen. On 26 February troops fired on crowds at Znamenskaya Square, but the following day the same unit that had done the shooting turned on its own officers: on 27 February, soldiers of the Volynsky Regiment shot their commanding officer and refused further orders, and the mutiny spread with extraordinary speed as regiment after regiment in the Petrograd garrison joined the revolution. By the end of that single day, over 60,000 soldiers had gone over to the side of the crowds. Losing the loyalty of the garrison was decisive: the main reason the Tsar fell was that the army failed to support Nicholas II and refused to fire on the protesters, meaning he could no longer rely on the army to prop up his government. Nicholas abdicated days later, and his brother's refusal of the throne ended three centuries of Romanov rule.

The February Revolution destroyed the old regime but produced no single successor. Two bodies claimed authority simultaneously in Petrograd: the Duma-based Provisional Government, and the Petrograd Soviet of workers' and soldiers' deputies elected in the same week. This arrangement, called Dual Power, meant two centres of power emerged to replace the tsarist government, of which the Provisional Government had formal authority but the Soviet controlled the actual levers of power, including the loyalty of the troops, and offered only conditional support to the government. The Soviet's Order Number One, issued within days, instructed soldiers to disregard any Provisional Government order the Soviet had not endorsed, so that the Soviet lacked formal legitimacy but possessed a broad membership and close ties with soldiers and workers giving it control of the military, factories, post, telegraphs and railways, while the Provisional Government had no authority over these things unless the Soviet rubber-stamped it. The historian Orlando Figes goes further, arguing that this was not really a stable division of labor at all: the period between February and October was marked by a breakdown of all central power, with real authority dissolving into thousands of local committees, factory councils, and peasant land seizures the government in Petrograd could neither direct nor stop. The Provisional Government's authority eroded through its own choices: it kept Russia in a deeply unpopular war, postponed the land question its peasant majority wanted settled, and postponed elections to the Constituent Assembly that alone could have given it a genuine mandate. By summer, according to one contemporary description, it had become the "Persuasive Government," largely impotent by the summer since it had to cajole or convince to get things done rather than command.

The event that did more than any other to hand the Bolsheviks the initiative was not their own doing. In late August 1917, the army's commander-in-chief, General Lavr Kornilov, moved troops toward Petrograd, apparently intending to crush the Soviet and impose military authority; Prime Minister Alexander Kerensky, uncertain of Kornilov's aims, denounced him as a traitor and armed the city's defenders, including the Bolsheviks, to resist. Kornilov sent troops toward Petrograd following the German occupation of Riga, and the rebellion failed partly due to resistance organized by the soviets and workers, which significantly boosted the prestige of the Bolsheviks, weakening the Provisional Government and paving the way for the Bolshevik seizure of power later that year. A historian of the alphahistory project's synthesis of this episode is blunt about the consequence: releasing radical socialists revived the Bolshevik movement and injected revolutionary leaders into an already hostile political environment, so that by aligning with the Bolsheviks to save itself, the Provisional Government had, in effect, signed its own death warrant. The party's growth in these weeks was extraordinary by any measure: at the beginning of 1917 the Bolsheviks had just 24,000 card-carrying members, but by the end of September this had grown to more than 400,000, a growth in support reflected in the Soviets, where Bolsheviks now held voting majorities in both Petrograd and Moscow, while the Red Guards, the Bolshevik militia, boasted around 100,000 men. (Other estimates from the same period are lower and the exact figure is disputed among historians, but every account agrees the growth after Kornilov was the sharpest of 1917.) The effect on the wider political spectrum was polarizing rather than moderating: Richard Pipes draws attention to the general radicalization of Russian public opinion in August–October 1917, as society increasingly rejected moderate alternatives, tending to support either the right-wing Kornilovites or the radical socialist Bolsheviks.

By late October the Bolsheviks controlled the Petrograd garrison in all but name and had, through the Military Revolutionary Committee, already occupied the city's key installations before the formal date of insurrection. On the night of 24-25 October, Bolshevik forces methodically took control of communications and transport nodes: Trotsky's five thousand soldiers, sailors and Military Revolutionary Committee commissioner members seized the Electric Power Station, the Main Post Office, the Nikolaevsky Bridge, the State Bank, and the Warsaw Station, largely without resistance. The final act, the storming of the Winter Palace where the Provisional Government's ministers had gathered, was militarily anticlimactic. As Trotsky's own contemporary account put it, the palace required limited forces, twenty-five to thirty thousand at most, and even then the military bases and state institutions fell with hardly any resistance; the Winter Palace was the last redoubt of a régime politically shattered during its eight months' existence, and conclusively disarmed during the preceding two weeks. The following day the Second Congress of Soviets, engineered to convene with a Bolshevik majority already secured, ratified the new government under Lenin. This is the crux of the historiographical dispute over the word "succeed." Some historians read October chiefly as the fruit of mass disillusionment reaching a boiling point; others read it as a small, disciplined conspiracy exploiting a power vacuum. One retrospective account frames the tension directly: Western historians have tended to view the Bolsheviks' success as the consequence of the Provisional Government's softness toward the radical left, or the result of a well-executed military coup lacking significant popular support, carried out by a small, united, authoritarian and conspiratorial organization controlled by Lenin — a view that now includes many historians in Russia today. Whichever emphasis a historian favors, the operational fact is not in dispute: there was very little fighting because there was very little left to fight for.

Vivid and detailed on the mechanics of the October seizure of power, but written by sympathetic observers and not disinterested.

Establishes the legal and institutional shape of Dual Power directly, though it cannot by itself establish how faithfully orders were obeyed on the ground.

Allowed cross-checking of Soviet-era official narratives against internal party records, but archival access and interpretation remain contested.

An unusually detailed participant account of the planning and execution of the October seizure of power, but written by one of its principal actors defending his own record.

Each historian works from overlapping evidence but reaches different conclusions about how much weight to give mass action versus elite maneuvering, which is why the underlying causal debate remains open rather than settled by evidence alone.

Would settle itThis is a counterfactual question about paths not taken and cannot be settled by evidence alone; it turns on how much causal weight is assigned to structural pressures versus the choices of specific actors, a judgment historians will continue to differ over.

Would settle itFiner-grained social history of participation levels among factory workers, soldiers, and the wider population during the actual days of the insurrection, an approach the revisionist school associated with Figes's phrase that historians are now 'all social historians' has partly pursued but not fully resolved.

The beliefThe October Revolution was a mass, bloody storming of the Winter Palace, as later Soviet films and propaganda depicted.

The recordContemporary accounts describe the actual military operation as small in scale and largely bloodless; Trotsky's own history states the palace fell to at most a few tens of thousands of poorly resisted besiegers, and one account of the Bolshevik seizure notes the Winter Palace suffered only minor structural damage compared with its dramatic cinematic depictions.

The beliefThe Bolsheviks led and orchestrated the February Revolution that toppled the Tsar.

The recordThe February Revolution was not planned or led by any party; contemporary accounts agree it began spontaneously with bread queues, strikes, and a women's march, and succeeded when the city garrison mutinied on its own initiative rather than through Bolshevik direction.

Britannica and Imperial War Museums accounts both date the abdication to this point, following the garrison mutiny and loss of army support.

Cited in Wikipedia's February Revolution entry sourced to period accounts; treated as a documented, if approximate, figure across secondary sources.

Alphahistory's synthesis notes the exact figure is unclear but most sources place it in this range.

Alphahistory and a Medium historical account both give 24,000 rising to over 400,000; a contemporaneous 1918 party report (via Seventeen Moments in Soviet History) instead cites roughly 180,000 members at the Sixth Party Congress in August and 300,000 by early 1918, and Wikipedia's Bolshevization of the Soviets entry gives a mid-1917 figure of 350,000 — the range across sources spans roughly 180,000 to over 400,000 and should be read as an order-of-magnitude surge rather than a precise count.

Consistent across Britannica and Alphahistory accounts, dating the march to around 24-25 August and Kornilov's arrest to roughly 1 September 1917.

Sourced to Wikipedia's account of the 'Bolshevization of the Soviets,' itself drawing on Richard Pipes's The Bolsheviks in the Struggle for Power; treated as reported rather than independently documented here.

Consistently dated across Britannica, Wikipedia, and History.com accounts, which explain the dual dating arising from Russia's use of the Julian calendar until 1918.

Figes, Orlando, A People's Tragedy: The Russian Revolution, 1891-1924 (1996)scholarly

A comprehensive, archive-based social history covering the full sweep from the 1891 famine through 1924, emphasizing grassroots and social causes alongside elite politics.

Pipes, Richard, The Russian Revolution (1990)scholarly

The leading statement of the view that the Bolshevik seizure of power is best understood as an organized coup rather than a spontaneous mass uprising.

Trotsky, Leon, The History of the Russian Revolution (1930)primary source

A detailed participant's account of the planning and execution of the October Revolution by one of its principal architects.

Fitzpatrick, Sheila, The Russian Revolution (1982)accessible

A concise, widely used introduction treating 1917 through the early 1930s as stages of a single revolutionary process, written for general readers and students.

Reed, John, Ten Days That Shook the World (1919)primary source

An eyewitness journalist's account of the October Revolution in Petrograd, among the most widely cited contemporary narratives of the events.

Nicholas II abdicated on 15 March 1917 (New Style; 2 March Old Style).

Britannica and Imperial War Museums accounts both date the abdication to this point, following the garrison mutiny and loss of army support.

Over 1,300 people were killed during the February 1917 protests in Petrograd.

Cited in Wikipedia's February Revolution entry sourced to period accounts; treated as a documented, if approximate, figure across secondary sources.

The Petrograd garrison numbered between 150,000 and 200,000 men in early 1917.

Alphahistory's synthesis notes the exact figure is unclear but most sources place it in this range.

Bolshevik party membership grew from about 24,000 at the start of 1917 to over 400,000 by the end of September 1917.

Alphahistory and a Medium historical account both give 24,000 rising to over 400,000; a contemporaneous 1918 party report (via Seventeen Moments in Soviet History) instead cites roughly 180,000 members at the Sixth Party Congress in August and 300,000 by early 1918, and Wikipedia's Bolshevization of the Soviets entry gives a mid-1917 figure of 350,000 — the range across sources spans roughly 180,000 to over 400,000 and should be read as an order-of-magnitude surge rather than a precise count.

The Kornilov affair took place in late August 1917, when General Lavr Kornilov moved troops toward Petrograd and was arrested after Kerensky denounced him.

Consistent across Britannica and Alphahistory accounts, dating the march to around 24-25 August and Kornilov's arrest to roughly 1 September 1917.

By the beginning of November 1917 Bolsheviks held up to 90% of seats in the Petrograd Soviet and up to 60% in the Moscow Soviet.

Sourced to Wikipedia's account of the 'Bolshevization of the Soviets,' itself drawing on Richard Pipes's The Bolsheviks in the Struggle for Power; treated as reported rather than independently documented here.

The October Revolution occurred on the night of 24-25 October 1917 in the Old Style Julian calendar (6-7 November New Style).

Consistently dated across Britannica, Wikipedia, and History.com accounts, which explain the dual dating arising from Russia's use of the Julian calendar until 1918.

Was the collapse of Tsarism in February 1917 structurally inevitable, or contingent on specific decisions and events?

Structuralist/inevitabilist reading: the war, economic strain, and the regime's political rigidity made collapse all but certain once war losses mounted; historians in this vein, including Figes, still frame the specific timing as owed to the regime's own failures rather than pure structure. vs Contingency-emphasizing reading: Richard Pipes argues explicitly that the collapse of tsarism, while not improbable, was not inevitable, and that specific failures of adaptation under wartime pressure made it likely rather than certain.

Was the October Revolution primarily a mass popular uprising or an organized minority coup?

Popular-uprising reading, associated with Soviet-era historiography and echoed by E. H. Carr's emphasis on mass mobilization under Lenin's leadership, holding that Bolshevik success reflected genuine and broad working-class and soldier support built up through 1917. vs Coup-d'état reading, most associated with Richard Pipes, holding that the October events were a calculated seizure of power by a small, disciplined party organization exploiting a power vacuum, with limited direct mass participation in the seizure itself.

How much genuine independent political agency did ordinary factory workers and soldiers exercise in the October events, as opposed to following organized Bolshevik direction?

This is the empirical core of the 'coup versus mass revolution' debate, and the surviving sources are disproportionately produced by political actors with a stake in one interpretation or the other.

What was the precise, verified Bolshevik party membership figure at the moment of the October seizure of power?

Cited figures for autumn 1917 range across sources from roughly 180,000 to over 400,000, and no single authoritative count has been agreed upon by historians.