Last week, violence erupted in Charlottesville, Virginia at a protest organized by white supremacists and hate groups. Three people were killed and many more were injured. Race permeates American culture, and its food. John T. Edge is one of the founders of a nonprofit called the Southern Foodways Alliance, and he’s just published a book that explores, among other things, race through the lens of food in the American South. It’s called “The Potlikker Papers: A Food History of the Modern South.”