Maoism is a development of Marxism-Leninism that emphasizes the role of peasants in revolution, the concept of protracted people's war, and continuous revolution under socialism. It also emphasizes mass mobilization and ideological purity. These elements distinguish Maoism from classical Marxism and Leninism.

O. KUUSINEN has written:

'Fundamentals of Marxism-Leninism'

In general terms, Leninism displayed Lenin's more radical view of Marxism. He also was pessimistic concerning his fellow Marxists to understand Marxism in the proper way as he believed he did.

Many pure Marxists are not happy with the overall acceptance of Leninism and its acceptance within the dogma of Marxism-Leninism. The primary criticism by pure Marxists on Leninism is that Lenin was so flexible that it allows his followers to justify almost any policy by sifting through Lenin's various policies and finding one that suits a policy supported by Marxism-Leninism.

When it was in existence, it was a gathering of Communist Parties to discuss the issues of the day that related to the progress of Marxism-Leninism.