Art is both foreground and background to all social change, the fulcrum by which we raise our personal and political standards, the wheel that propels every revolution — in thought, in feeling, in the constellation of customs, beliefs, principles, power structures, and sensibilities we call culture. “Any human power can be resisted and changed by human beings. Resistance and change often begin in art,” Ursula K. Le Guin asserted in her superb National Book Award acceptance speech. It is hardly…