Some of the stories were conjured by white plantation owners taking advantage of the long-held African belief that ghosts caused disease and death. To discourage slaves from meeting or escaping, slave owners told tales of gruesome research done on black bodies, then covered themselves in white sheets and crept around at night, posing as spirits coming to infect black people with disease or steal them for research. Those sheets eventually gave rise to the white hooded cloaks of the Ku Klux Klan.
