"We deserve neither credit nor blame for our ancestors and the degree of interest in this story suggests that we are, as a nation, still grappling with the terrible legacy of slavery," Affleck wrote. John Shearer/AP hide caption

itoggle caption John Shearer/AP

Makeshift memorials to Walter Scott sprouted up at the scene of his fatal encounter with Michael Slager, the police officer who shot him in the back as he ran away following a routine traffic stop. David Goldman/AP hide caption

itoggle caption David Goldman/AP

Entrance into the city's specialized high schools is entirely dependent on a 2 1/2-hour standardized test. Critics, including the mayor, want to change the admissions process to boost numbers of blacks and Latinos. Orin Hassan/Flickr hide caption

itoggle caption Orin Hassan/Flickr

A protester stands in front of police vehicles with his hands up during a demonstration in Ferguson, Mo., where in August 2014 a white police officer shot and killed an 18-year-old black man. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

When fledgling networks like Fox, UPN and the WB started wooing black viewers in the 1990s, the prime-time audience began to split. Fox's Living Single was the highest-rated show among black viewers in 1994-95 but didn't crack the top 100 among whites. The Kobal Collection/Warner Bros. Television/The Kobal Collection hide caption

itoggle caption The Kobal Collection/Warner Bros. Television/The Kobal Collection

Two years ago, Charles Ramsey, Philadelphia's police commissioner, called for a federal review of the city's police practices. Ramsey called for a similar federal inquiry during his tenure as Washington, D.C.'s police chief. Matt Rourke/AP hide caption

itoggle caption Matt Rourke/AP

A young girl with a white father and a black mother wrote to the half-Vulcan, half-human Spock for advice on fitting in. FaVE! Magazine, via My Star Trek Scrapbook hide caption

itoggle caption FaVE! Magazine, via My Star Trek Scrapbook