In 1935 George Gershwin continued the melding of theatrical, classical, and jazz idioms he began with "Rhapsody in Blue " bringing DuBose Heyward's novel and play Porgy to the musical stage with Porgy and Bess. Collaborating with his brother Ira and Heyward, Gershwin created what was deemed at the time a "folk opera" - a work that over the years has passed through cycles of praise and criticism, finally achieving recognition as a great...