... When it incorporated in 1947, this village, called Lincoln Heights, was the first primarily black self-governing community north of the Mason-Dixon line. (Today, the city has one of the highest concentrations of African American residents in the state of Ohio—according to the Census, 95.5 percent.) Lincoln Heights thrived for a while, producing poet Nikki Giovanni, songwriters the Isley Brothers (who wrote “Twist and Shout”), and scholar Carl Westmoreland, who now helps run the National Underground Railroad Freedom Center. Hundreds of residents worked at the nearby Wright Aeronautical Plant, manufacturing the B-29 bomber, and at a chemical plant a few...