The October Revolution and Bolshevik Consolidation 1917–1921

The October Revolution of 1917 (November by the Western calendar) brought the Bolsheviks to power in one of the most consequential political events of the twentieth century. Yet seizing power proved far easier than holding it. Between 1917 and 1921, the Bolsheviks faced civil war, foreign intervention, economic collapse, and internal dissent. Their survival required ruthless pragmatism, creating institutions and methods that would shape the Soviet state for decades.

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The October Revolution

The Decision to Seize Power

By October 1917, the Bolsheviks had achieved majorities in the Petrograd and Moscow Soviets. Lenin, still in hiding in Finland, bombarded the Central Committee with letters demanding an immediate seizure of power.

The decision was controversial within the party:

Position	Advocates
Immediate insurrection	Lenin argued that delay was fatal — 'History will not forgive us if we do not take power now'
Caution	Kamenev and Zinoviev publicly opposed insurrection, arguing the Bolsheviks should work through the forthcoming Congress of Soviets
Military planning	Trotsky, as chairman of the Petrograd Soviet's Military Revolutionary Committee (MRC), organised the practical seizure of power