How did terry riley become famous?

Terry Riley became famous as a pioneering composer in the minimalist music movement, particularly recognized for his groundbreaking piece "In C," composed in 1964. This work, characterized by its repetitive structures and flexible performance style, significantly influenced contemporary music and composers. Riley's innovative use of improvisation and layering has also garnered attention in the realms of both classical and experimental music. His collaborations with other musicians and contributions to the development of electronic music further solidified his reputation as a key figure in 20th-century music.