"This book discusses the long history of the deleterious effects of racial segregation on health in the United States. Author Brown puts Baltimore under a microscope because Baltimore was the first city in America to enact segregationist legislation and because it remains hypersegregated to this day. "Black butterfly" describes the shape of a demographic map that plots Baltimore's population by race: a white central axis with black wings east and...

Introduces Rosa Parks, who made history by refusing to give up her bus seat to a white person in 1950s Montgomery, Alabama.