Claude Debussy (1862-1918) revolutionized how composers approached harmony, timbre, and form in the late 19th century. His harmonic innovations challenged traditional voice leading rules and opened new expressive possibilities for the piano, establishing him as a foundational figure in early modern music.
Debussy's piano works remain cornerstones of the repertoire because they demand both technical control and imaginative sound production. His influence extends far beyond classical music into film scoring, jazz, and contemporary composition.