“Hound Dog,” allegedly stolen by Elvis from Big Mama Thornton, was written by two New York Jews. One of the greatest icons of country music, considered by fools to be foolish, was the paradoxical Johnny Cash, theological fundamentalist, musical heretic, and politically a self-described “dove with claws” who opposed most American wars. Such are the contradictions of “One Nation Under Elvis,” mapped by contrarian prose psalmist Rebecca Solnit in the latest issue of Orion.