 Second, there are criticisms pressing on coherence issues arising from Cohen’s reconstruction of Marx’s theory. For example, there is some scepticism about whether the “base” can be distinguished from the “superstructure” in the way that he requires (F. Cohen &amp; Acton 1970; Lukes 1982). Or, to give another example, whether Cohen’s distinction between social and material properties is conceptually flawed in ways that undermine his claims about the primacy of the productive forces (Coram 1989).