paragraph_text: Zajedno sa socijaldemokracijom komunizam je do 20-ih godina 20. stoljeća postao dominantnom političkom tendencijom u međunarodnom socijalističkom pokretu.<ref>Newman, Michael. 2005. Socialism: A Very Short Introduction. Oxford University Press. str. 5: "Chapter 1 looks at the foundations of the doctrine by examining the contribution made by various traditions of socialism in the period between the early 19th century and the aftermath of the First World War. The two forms that emerged as dominant by the early 1920s were social democracy and communism." Uspostavom Sovjetskog Saveza kao prve svjetske nominalno komunističke države dolazi do raširenog poistovjećivanja samog komunizma s ideologijom marksizma-lenjinizma i sovjetskog tipa planskog gospodarstva.Busky, Donald F. 2000. Democratic Socialism: A Global Survey. Praeger. str. 6–8: ISBN 978-0-275-96886-1. "In a modern sense of the word, communism refers to the ideology of Marxism-Leninism.… [T]he adjective democratic is added by democratic socialists to attempt to distinguish themselves from Communists who also call themselves socialists. All but communists, or more accurately, Marxist-Leninists, believe that modern-day communism is highly undemocratic and totalitarian in practice, and democratic socialists wish to emphasise by their name that they disagree strongly with the Marxist-Leninist brand of socialism."<ref>"Communism." 2007. Columbia Encyclopedia (6th ed.). Gotovo sve komunističke vlasti 20. stoljeća krenule su ka uspostavljanju komunizma raznim inačicama marksizma-lenjinizma.<ref>Smith, Stephen. The Oxford Handbook of the History of Communism. Oxford University Press, 2014. str.3 Prema nekim ekonomistima i intelektualcima taj model je u praksi uspostavio države koje su, iako imenom komunističke, u stvari djelovale kao oblik državnog kapitalizmaChomsky, Noam. 1986. "The Soviet Union Versus Socialism." Our Generation (Spring/Summer). via Chomsky.info. Pristupljeno 10. lipnja 2020.Howard, M. C. in J. E. King. 2001. "'State Capitalism' in the Soviet Union." History of Economics Review 34(1):110–26. .Wolff, Richard D. 27. lipnja 2015. "Socialism Means Abolishing the Distinction Between Bosses and Employees." Truthout. Pristupljeno 29. siječnja 2020. ili neplaniranog upravno-komandnog gospodarstva., a ne stvarnog komunističkog ekonomskog modela koji je u skladu s prihvaćenim definicijama komunizma kao ekonomske teorije.