Throughout the summer, the Bolsheviks greatly increased their popular support, and in October the Bolsheviks gained a fragile majority in the Petrograd Soviet. Now Lenin’s supporter Leon Trotsky (1879–1940) brilliantly executed the Bolshevik seizure of power. Painting a vivid but untruthful picture of German and counter-revolutionary plots, Trotsky convinced the Petrograd Soviet to form a special military-revolutionary committee in October and make him its leader. Thus military power in the capital passed into Bolshevik hands. On the night of November 6, militants from Trotsky’s committee joined with trusted Bolshevik soldiers to seize government buildings in Petrograd and arrest members of the provisional government. Then they went on to the Congress of Soviets, where a Bolshevik majority declared that all power had passed to the soviets and named Lenin head of the new government.

The Bolsheviks came to power for three key reasons. First, by late 1917, democracy had given way to anarchy: power was there for those who would take it. Second, in Lenin and Trotsky, the Bolsheviks had an utterly determined and superior leadership, which both the tsarist and the provisional governments lacked. Third, Bolshevik policies appealed to ordinary Russians. Exhausted by war and weary of tsarist autocracy, they were eager for radical changes.