Revisionism is the revision of the tenets of Marxism-Leninism. It is viewed as a crime against the communist state as it opposes Marxist-Leninist doctrine on all points. It rejects the necessity of revolution and asserts that capitalism should be simply reformed, claiming that the modern scientific and technological revolution is totally reshaping the structure of society and 'erasing' class antagonisms. Revisionism seeks to disarm the working class ideologically and to instil among workers reformist or anarchist views.
Revisionism arose in the late 1870's in the German Social Democratic Party, which had accepted Marxism. In 1879 Edouard Bernstein, along with two others, proposed a revision of the basic tenets of Marxism, and in the late 1890's, Bernstein came out with his full-fledged programme for revisionism.
The former Soviet Union attributes the Hungarian Revolution of 1956 to the revisionist group founded by I Nagy and G Losonczy.