"Intersectionality is a concept, not a theory. It is a description of how different forms of oppression--racism, sexism, LGBTQ oppression and all other forms--interact with each other and become fused into a single experience. ... Intersectionality is another way of describing "simultaneity of oppression," "overlapping oppressions," "interlocking oppressions" or any number of other terms that Black feminists used to describe the intersection of race, class and gender."
January 1, 1970
https://en.wikiquote.org/wiki/Sharon_Smith_(writer)