No movement can claim to speak for all women unless it speaks for women who also face the consequences of racism, which places women of color overwhe… - 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.

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.

Black feminism also contains a strong emphasis on the class differences that exist between women, because the vast majority of the Black population in the U.S. has always been a part of the working class, and disproportionately living in poverty, due to the economic consequences of |racism.