Challenges the longstanding perception that modernist composers made art, not money, and that those who made money somehow failed to make art. Patrons have long appeared as colorful, exceptional figures in music history, but this book recasts patrons and patronage as creative forces that shaped the sounds and meanings of new French music between the world wars. Far from mere sources of funding, early twentieth-century patrons collaborated closely with composers, treating commissions for new music as opportunities to express their own artistry. Patrons developed new pathways to participate in music-making, going beyond commissions to establish ballet companies, manage performance venues, and establish state programs. The impressive variety of patronage activities led to an explosion of new music as well as new styles and -isms, indelibly marking the repertoire that this book examines, including a number of pieces frequently heard in concert halls today. In addition to offering new perspectives on well-known French repertoire, this book challenges conceptions of patronage as a bygone phenomenon. Complementing a dwindling cast of aristocratic patrons were new ranks of music publishers, impresarios, state bureaucrats, opera directors, and others capitalizing on their savings, social connections, and artistic vision to bring new music into the world. In chapters on French discourse around patronage, aristocratic commissions, the stimulus provided by the interwar dance craze, music publishing, the Paris Opera, state intervention in French musical life, and transatlantic musical exchanges, the book blends cultural history with primary source study and music analysis. It not only improves our understanding of French musical life and culture during the early twentieth century but also supplies us with essential insights into the ways modern music emerged at the intersection of music composition, aesthetic and national politics, and the creative labor of patrons.