From its conception by Frank L. Baum in 1900, the Oz universe has been a surreptitious commentary on American culture, politics, and social causes. The book was already a popular musical on Broadway by 1902, and Baum himself staged theatrical, radio, and film adaptations in subsequent decades. In April 2000, the Library of Congress declared The Wonderful Wizard of Oz to be “America’s greatest and best-loved homegrown fairy tale.” Now costume designer Paul Tazewell puts his own stamp on the ever evolving world of Oz.