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 Christian Manifesto signatories can be interpreted in two ways: a relatively high number of signatories testifies to the success of Wu and the campaign to accommodate to the communist government. Conversely, the number of people who did not sign the manifesto count as people who did not want the Chinese church to sever its links with foreigners. It was feared that the NCC, which had facilitated cooperation between Chinese Protestants and foreign missionaries since 1922, would lose its independence. Most appear to have signed the document out of patriotic sentiments, not because of fundamental agreement with the actual provisions of the manifesto: