The Bolsheviks led the workers to power in the October Revolution of 1917. To ensure its survival, they grappled with the task of spreading the revolution beyond Russia. 'Left-Wing' Communism: An Infantile Disorder was written in 1920 to educate the newly-formed communist parties of the Third International, and to correct the ultra-left, sectarian trends that infected many of them. Inspired by the Revolution and repelled by the...