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Comintern and world revolution: 1919–1920

The Second Congress of the Communist International opened in Petrograd's Smolny Institute in July 1920, representing the last time that Lenin visited a city other than Moscow. There, he encouraged foreign delegates to emulate the Bolsheviks' seizure of power and abandoned his longstanding viewpoint that capitalism was a necessary stage in societal development, instead, encouraging those nations under colonial occupation to transform their pre-capitalist societies directly into socialist ones. For this conference, he authored "Left-Wing" Communism: An Infantile Disorder, a short book articulating his criticism of elements within the British and German communist parties who refused to enter their nations' parliamentary systems and trade unions; instead, he urged them to do so to advance the revolutionary cause. The conference had to be suspended for several days due to the ongoing war with Poland, and was relocated to Moscow, where it continued to hold sessions until August. Lenin's predicted world revolution did not materialise, as the Hungarian communist government was overthrown, and the German Marxist uprisings suppressed.