Following the communist revolutions of the 20th century all "means of production" became the property of the state as representative of "the masses". Private property ceased to exist. While moral rights of the creator were recognized and economic rights acknowledged with a one-time cash award, all subsequent rights reverted to the state.
With the transformation of many communist countries to a market system most of them have now introduced laws establishing markets in intellectual property rights. Still the high rate of piracy reflects a certain lack of legal tradition.
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Though Sergei Eisenstein (1898-1948) made only seven films in his entire career, he was the USSR's most important movie-conductor in the 1920s and 1930s. His typical style, putting mountains of metaphors and symbols into his films, is called the "intellectual montage" and was not always understood or even liked by the audience. Still, he succeeded in mixing ideological and abstract ideas with real stories. His most famous work was The Battleship Potemkin (1923).