For most of his adult life Severt Young Bear stood in the light--in the center ring at powwows and other gatherings of Lakota people. As founder and, for many years, lead singer of the Porcupine Singers, a traditional singing and drumming group, he also stood, figuratively, in the light of understanding the cherished Lakota heritage. Young Bear's own life in Brotherhood Community, Porcupine District of the Pine Ridge Sioux Reservation, is the linchpin...