American composer who was one of the leading exponents of minimalism, a style based on repetitions and combinations of simple motifs and harmonies.

The son of an attorney and a singer-lyricist, Reich majored in philosophy at Cornell University (1953–57), then studied composition at Juilliard School of Music before taking his master's degree from Mills College (1963), where his teachers included Darius Milhaud and Luciano Berio. Reich also performed on keyboard instruments and percussion; by 1966, when he formed his own ensemble, he was already creating minimalist compositions. These works rejected the characteristic complexity of mid-20th-century classical harmony and tonality in order to make large-scale works from minimal materials—a single chord, a brief musical motif, a spoken exclamation—which are repeated at length, with small variations introduced very slowly; some of his works combined live and taped performers.

Reich drew inspiration from ethnic and ancient musics and studied African drumming in Ghana (1970), Balinese gamelan music in Seattle (1973), and Middle Eastern chanting in Jerusalem (1977). His best-known compositions include Four Organs (1970), for four electric organs and maracas; Drumming (1971), for small tuned drums, marimbas, glockenspiels, two voices, whistling, and piccolo; Clapping Music (1972), for two pairs of clapping hands; and The Desert Music (1984), a setting of a William Carlos Williams poem scored for 106 musicians.