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
May Manifesto May Manifesto The "May Manifesto" of May 6, 1924 was a paper in which the objectives of the unified Macedonian liberation movement were presented: independence and unification of partitioned region of Macedonia, fighting all the neighbouring Balkan monarchies, supporting the Balkan Communist Federation and cooperation with the Soviet Union. In 1919, the Balkan Communist Federation was established as an umbrella group for the various Balkan communist parties and had the official endorsement of the Soviets. Its first meeting was called in Sofia to promote Bulgarian communists Macedonian Question policy. It was heavily influenced by the policy of the Bulgarian Communist