 A second group of comprehensive criticisms focus on the substantive concerns of analytical Marxism. The critical suggestion here is typically that in translating the substantive concerns of traditional Marxism into the language and frameworks of “mainstream social science”, analytical Marxism has lost what was valuable about them (Levine 2003: 123). For instance, it is suggested that analytical Marxism’s treatment of exploitation, class, and history, involves an abstract, individualistic, and ahistorical, framework that makes its conclusions hard to distinguish, in many respects, from the theories of “bourgeois social science” (E. Wood 1989: 55). Or, in an another variant, that analytical Marxists seem to have lost sight of, or never really appreciated, the centrality of the “system of labour” to Marx’s substantive account of human society (Chitty 1998: 40).