This book examines the key turning points in the history of the Orpheus myth as factors that shaped, and continues to shape, our conceptions of music's powers. From its beginnings in archaic Antiquity to the latest major opera based on it, the story of Orpheus and Eurydice has been used by poets, philosophers, and musicians to express an increasingly complex set of ideas about what music can do. The study follows three threads in the myth's history: changes in form, cultural status, and the resulting visions of the powers of song. The most spectacular change in form is the role played by Eurydice who evolves from a generic, voiceless type into a rich music-philosophical symbol. Equally fascinating is the entangled issue of Orpheus's success and failure. In terms of cultural status, the story remains a genuine myth, ?even alongside its non-mythical forms, ?until the early modern period. Modernity problematizes the existence of myth but its mythophobia becomes a symptom of its own profound irrationality. Accordingly, the powers of music evolve from mythic omnipotence to screaming contradictions that demand, but fail to achieve, resolution. From Monteverdi and Striggio to Birtwistle and Zinovieff, composers and librettists turn to Orpheus and Eurydice to express their sense of music's place in human existence. The undulating tapestry of their strikingly diverse answers points to the need to rethink, once again, the fundamentals of our musical culture.