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
The Communist Manifesto a new title—"The Voice of Communism: Declaration of the Communist Party". In June–November 1850 the "Manifesto of the Communist Party" was published in English for the first time when George Julian Harney serialised Helen Macfarlane's translation in his Chartist magazine "The Red Republican". (Her version begins, "A frightful hobgoblin stalks throughout Europe. We are haunted by a ghost, the ghost of Communism.") For her translation, the Lancashire-based Macfarlane probably consulted Engels, who had abandoned his own English translation half way. Harney's introduction revealed the "Manifesto"s hitherto-anonymous authors' identities for the first time. Soon after the "Manifesto" was published, Paris erupted