From Wikipedia

Art of Russia

Part Three
Smashing the Mould

During the Russian Revolution a movement was initiated to put all arts to service of the dictatorship of the proletariat. The instrument for this was created just days before the October Revolution, known as Proletkult, an abbreviation for "Proletarskie kulturno-prosvetitelnye organizatsii" (Proletarian Cultural and Enlightenment Organizations). A prominent theorist of this movement was Alexander Bogdanov. Initially, Narkompros (ministry of education), which was also in charge of the arts, supported Proletkult. Although Marxist in character, the Proletkult gained the disfavor of many party leaders, and by 1922 it had declined considerably. It was eventually disbanded by Stalin in 1932. De facto restrictions on what artists could paint were abandoned by the late 1980s.

However, in the late Soviet era many artists combined innovation with socialist realism including Ernst Neizvestny, Ilya Kabakov, Mikhail Shemyakin, Erik Bulatov, and Vera Mukhina. They employed techniques as varied as primitivism, hyperrealism, grotesque, and abstraction. Soviet artists produced works that were furiously patriotic and anti-fascist in the 1940s. After the Great Patriotic War Soviet sculptors made multiple monuments to the war dead, marked by a great restrained solemnity.