The contemporary historian Patricia Galloway argues from fragmentary archaeological and cartographic evidence that the Choctaw did not exist as a unified people before the 17th century. Only then did various southeastern peoples, remnants of Moundville, Plaquemine, and other Mississippian cultures, coalesce to form a self-consciously Choctaw people. The historical homeland of the Choctaw, or of the peoples from whom the Choctaw nation arose, included the area of "Nanih Waiya", an earthwork mound in present-day Winston County, Mississippi, which they considered sacred ground. Their homeland was bounded by the Tombigbee River to the east, the Pearl River on the north and west, and "the Leaf-Pascagoula system" to the South. This area was mostly uninhabited during the Mississippian -culture period.