Moses has long been a source of modern fascination. For Sigmund Freud and psychoanalysis, Moses was a particularly fruitful subject for the study of memory and historiography. He also held great interest for the visual and performing arts. In the 1920s and '30s, the composer Arnold Schoenberg wrote the three-act opera Moses and Aron. First performed just a few years before his exile to the United States, it required that its audiences distinguish...