A segment of African Americans has long been obsessed with promoting images that are positive representations of The Race, but recurring police atrocities show the necessity to “expose the regime of ‘representation’ that further marginalizes us, as opposed to trying to conform to that regime.” said Brenna Greer, a professor of Social Sciences and History at Wellesley College. Greer is author of “Represented: The Black Imagemakers That Reimagined African American Citizenship.”