Business cycle by Charles Dunoyer, and similar theories, showing signs of influence by Sismondi, were developed by Johann Karl Rodbertus. Periodic crises in capitalism formed the basis of the theory of Karl Marx, who further claimed that these crises were increasing in severity and, on the basis of which, he predicted a communist revolution. Though only passing references in "Das Kapital" (1867) refer to crises, they were extensively discussed in Marx's posthumously published books, particularly in "Theories of Surplus Value". In "Progress and Poverty" (1879), Henry George focused on land's role in crises – particularly land speculation – and proposed a single
Art manifesto Surrealist André Breton supported the Communist party. Often however, these political organizations rejected the artists’ attention; in other cases, artists were censored and persecuted by European authoritarian governments, like Fascist Italy and Communist Russia, which institutionally rejected the avant-garde. Gustave Courbet wrote a Realist manifesto for the introduction to the catalogue of his independent, personal exhibition, 1855, echoing the tone of the period's political manifestos. In it he asserts his goal as an artist "to translate the customs, the ideas, the appearance of my epoch according to my own estimation." In 1886 the Symbolist Manifesto was published in the French