Carl Ruggles (1876-1971) was an American composer known for his significant contributions to 20th-century classical music. He primarily worked within the genre of modern classical, often associated with the American avant-garde movement. Ruggles' music is characterized by its complex rhythms, dense textures, and bold harmonic language, which often diverged from traditional tonal structures. Notable works include "Sun-Treader" (1926), a symphonic poem that showcases his unique style, and "Angels" (1945), a choral piece that reflects his deep spiritual beliefs. His compositions often emphasize the emotional and expressive potential of music, merging elements of American folk traditions with European modernism. Ruggles' impact on music lies in his role as a bridge between the earlier American composers and the avant-garde movements of the 20th century. He was part of a group of composers, including Charles Ives and Henry Cowell, who sought to develop a distinct American voice in classical music. Though not as widely known as some of his contemporaries, Ruggles' work has been influential in shaping the landscape of modern American classical music, and he remains an important figure in music history.