It is called "the most comprehensive map of race in America ever created." One dot for each person in the country; 300 million dots, all color-coded. The image I have shared here comes from the part of Saint Louis County where I grew up, in Missouri, where a newish white suburb, Crestwood, arose next door to an older black unincorporated district, Meacham Park. Among the notable episodes in Meacham Park history was neighboring Kirkwood paying tuition for Meacham Park students to attend high school in the city of St. Louis rather than in Kirkwood--it's hard to imagine an excuse for that move except racial segregation. The bit of map I've shown here reveals how enduring is the segregation that was formalized a century ago. Thanks to the map's creator, Dustin Cable, University of Virginia’s Weldon Cooper Center for Public Service.