Black History Month, essential as it is, is too often a respite from white history, a way for Americans of all colors to embrace the heroics of Harriet Tubman, W.E.B. DuBois and so many others without examining the villainy of a country that made their heroics necessary. I understand the choice to hold Black stories apart from the larger American narrative, to give them the space they deserve, at least once a year. But elevating Black history in February has ironically also been a way to elevate racial denial.

In...