sentences:  Wallace' model 1956 describes the process of a revitalization movement.It is derived from studies of a Native American religious movement, The Code of Handsome Lake, which may have led to the formation of the Longhouse Religion.Wallace derived his theory from studies of so-called primitive peoples (preliterate and homogeneous), with particular attention to the Iroquois revitalization movement led by Seneca religious leader and prophet Handsome Lake (1735-1815).