To be clear: there is no question that postmodernism has advanced the struggle against all forms of oppression, including the oppression experienced … - Sharon Smith

Because intersectionality is a concept (a description of the experience of multiple oppressions, without explaining their causes) rather than a theory (which does attempt to explain the root causes of oppressions), it can be applied alongside different theories of oppression--theories informed by Marxism or postmodernism, but also , etc. Because Marxism and postmodernism are often antithetical, their specific uses of the concept of intersectionality can be very different and in very different and contrary ways.

Postmodernists place an overriding emphasis on the limited, partial, subjective character of people's individual experiences--rejecting the strategy of collective struggle against institutions of oppression and exploitation to instead focus on individual and as centers of struggle. It isn't a coincidence that postmodernism flourished in the world of academia in the aftermath of the decline of the class and social movements of the 1960s and 1970s--and the rise of the ruling class's neoliberal onslaught. Some of the academics involved in the ascendancy of postmodernism were veteran 1960s radicals who had lost faith in the possibility for revolution. They were joined by a new generation of radicals too young to have experienced the tumult of the 1960s, but were influenced by the pessimism of the period. In this context, Marxism was widely disparaged as "reductionist" and "essentialist" by academics calling themselves postmodernists, post-structuralists and post-Marxists. ... The emphasis shifted away from solidarity between movements, and also from collective struggle to individual, interpersonal struggle. In this way, interpersonal relationships became the key sites of struggle, based on subjective perceptions of which individual is in a position of "" and which is in a position of "" in any particular situation.

Many activists who have heard the term "intersectionality" being debated on the left have found it difficult to define it--and for a very understandable reason: Different people explain it differently and therefore are often talking at cross-purposes. For this reason--along with the fact that it is a seven-syllable word--intersectionality can appear to be an abstraction with only a vague relationship to material reality. It would be a mistake, however, to dismiss the concept out of hand. There are two quite distinct interpretations of intersectionality: one developed by Black feminists and the other by those from the "post-structural" wing of postmodernism. ... Black feminist tradition advances the project of building a unified movement to fight all forms of , which is central to the socialist project--while post-structuralism does not.