He watched an hour-long lecture by Dr. Joy DeGruy on what she called “Post Traumatic Slave Syndrome.” He listened to the work of Tim Wise, an activist who speaks on college campuses and with corporations on fighting racism. He watched Morgan Freeman’s National Geographic series, The Story of Us. He watched Noam Chomsky’s documentary on American wealth distribution, Requiem for the American Dream. He watched Ava DuVernay’s examination of incarceration, the Netflix documentary, 13th. “13th turned the light bulb on,” Stills says.