""Left-Wing"" Communism: An Infantile Disorder (Russian: Детская болезнь ""левизны"" в коммунизме, Detskaya Bolezn' ""Levizny"" v Kommunizme) is a work by Vladimir Lenin attacking assorted critics of the Bolsheviks who claimed positions to their left. Lenin's famous work explains why communists should work in bourgeois parliaments and reactionary trade unions, and in general exposes the ""left"" errors that arose in some of the new communist parties. The book is divided into ten chapters and an appendix.