 Prior to Cohen’s work, historical materialism had not been regarded as a coherent view within English-language political philosophy. The antipathy is well summed up with the closing words of H.B. Acton’s The Illusion of the Epoch: “Marxism is a philosophical farrago” (1955: 271). One difficulty taken particularly seriously by Cohen is an alleged inconsistency between the explanatory primacy of the forces of production, and certain claims made elsewhere by Marx which appear to give the economic structure primacy in explaining the development of the productive forces. For example, in The Communist Manifesto Marx and Engels state that: “The bourgeoisie cannot exist without constantly revolutionising the instruments of production” (MECW 6: 487). This appears to give causal and explanatory primacy to the economic structure—capitalism—which brings about the development of the forces of production. Cohen accepts that, on the surface at least, this generates a contradiction. Both the economic structure and the development of the productive forces seem to have explanatory priority over each other. Unsatisfied by such vague resolutions as “determination in the last instance”, or the idea of “dialectical” connections, Cohen self-consciously attempts to apply the standards of clarity and rigour of analytic philosophy to provide a reconstructed version of historical materialism.