Activists in the earliest Black antebellum reform endeavors contested and deprecated the concept of race. Attacks on the logic and ethics of dividing, grouping, and ranking humans into races became commonplace facets of activism in anti-colonization and emigration campaigns, suffrage and civil rights initiatives, moral reform projects, abolitionist struggles, independent church development, and confrontations with scientific thought on human origins. Denunciations persisted even as later generations of reformers felt compelled by theories of progress and American custom to promote race as a basis of a Black collective consciousness. traces a history of the disparate challenges Black American reformers lodged against race across the long nineteenth century. It factors their opposition into the nation's history of race and reconstructs a reform tradition largely ignored in accounts of Black activism. Black-controlled newspapers, societies, churches, and conventions provided the principal loci and resources for questioning race. In these contexts, people of African descent generated a lexicon for refuting race, debated its logic, and, ultimately, reinterpreted it. Reformers' challenges call into question the notion that race is a self-evident site of identity among Black people. Their ideas instead spotlight legal, political, religious, social, and scientific practices that configured human difference, sameness, hierarchy, and consciousness. They show how a diverse set of actions constituted multi-faceted American phenomena dubbed "race."