US civil rights expanded a diverse middle class while imprisonment of minorities ballooned

Evidence

The civil rights movement in the US, by contrast, clearly has had significantly better if still decidedly mixed results. It has helped to consolidate a more ethnoracially diversified middle class with some economic access and local political power but with definitive limits at the broader national level. These affirmations are offset, nevertheless, by the increasing numbers of impoverished and deprived families of color and a ballooning prison population overwhelmingly black and Latino. The civil rights movement nonetheless managed to invigorate broad antiracist sensibilities alongside expanded civil rights for all, and served as a beacon of sorts, even if a tenuous one, for global standards of ethnoracial civility. — David Theo Goldberg, The Threat of Race, 106