Kimberlé Crenshaw introduced the term "intersectionality" in her 1989 article "Demarginalizing the Intersection of Race and Sex: A Black Feminist Critique of Antidiscrimination Doctrine, Feminist Theory, and Antiracist Politics" where she argued that by refusing to consider the multiple and intersecting oppressions of being both women and Black, that established legal frameworks harm Black women. Crenshaw's theory of intersectionality has been applied, both in academia and in popular thought, to many situations in which a person's multiple identities interact to create overlapping oppression.
Disabled people are not only disabled. They are also sometimes women, People of Color, part of the LGBTQIA+ community and / or living in poverty. Disability intersects with many identities. As you research, look for these intersections. Consult the further reading section below for a small selection of resources that explore intersectionality as it is related to disability.