On this installment of ST, a discussion of the history of race relations in America -- and of a landmark Supreme Court decision that profoundly shaped this history. Steve Luxenberg is our guest; he is a longtime senior editor at The Washington Post, and his new book is "Separate: The Story of Plessy v. Ferguson, and America's Journey from Slavery to Segregation." As Louis Menand of The New Yorker Magazine has noted: "Luxenberg has chosen a fresh way to tell the story of Plessy.... 'Separate' is deeply researched, and it wears its learning lightly. It's a storytelling kind of book.... [The author] skillfully works the military and the political background into his narrative." And further, from The New York Times: "Luxenberg gives a three-dimensional and almost novelistic treatment to the players involved, drawing on diaries, letters, and archival research."