Above: (1) Enslaved Africans in Hold of Slave Ship, 1827. Bristol Central Reference Library and Adam Hochschild. (2) Jack Delano, Group of Florida migrants on their way home to Cranberry, New Jersey, to pick potatoes, near Sharboro, North Carolina, July 1941. Farm Security Administration, Prints and Photographs Division, Library of Congress. (3) Jacob Lawrence, The Migration Series, 1940-41. Tempera on Hardboard (The Phillips Collection, Washington D.C.). Photo by Steven Zucker.