Pierre Boulez was a towering figure in contemporary music from the 1940s and 1950s to his death in 2016. This volume demonstrates his distinctive impact on new music and situates him within a wide range of contexts to enhance appreciation of the cultural embeddedness of his work. Successive sections consider his early life and education, his engagements with cultural, musical, literary and artistic modernism, his relationships with his modernist predecessors and contemporaries, and the intersections of his work with literature, visual art, mathematics, philosophy and technology. Contributors explore his various roles as composer, conductor, recording artist, writer, teacher and systems builder, as well as his role in French cultural politics, his move to Germany and the time he spent in the United States. This book is essential for students and educators but also accessible to a general audience interested in Boulez's legacy and his unique position in recent music history.