Stephen Michael Reich (/raɪʃ/ born October 3, 1936) is an American composer who, along with La Monte Young, Terry Riley, and Philip Glass, pioneered minimal music in the mid to late 1960s.

Reich’s style of composition influenced many composers and groups. His innovations include using tape loops to create phasing patterns (for example, his early compositions It’s Gonna Rain and Come Out), and the use of simple, audible processes to explore musical concepts (for instance, Pendulum Musicand Four Organs). These compositions, marked by their use of repetitive figures, slow harmonic rhythm and canons, have significantly influenced contemporary music, especially in the US. Reich’s work took on a darker character in the 1980s with the introduction of historical themes as well as themes from his Jewish heritage, notably Different Trains.

Writing in The Guardian, music critic Andrew Clements suggested that Reich is one of “a handful of living composers who can legitimately claim to have altered the direction of musical history”. The American composer and critic Kyle Gann has said that Reich “may … be considered, by general acclamation, America’s greatest living composer”.

Reich was born in New York City to the Broadway lyricist June Sillman and Leonard Reich. When he was one year old, his parents divorced, and Reich divided his time between New York and California. He is the half-brother of writer Jonathan Carroll. He was given piano lessons as a child and describes growing up with the “middle-class favorites”, having no exposure to music written before 1750 or after 1900. At the age of 14 he began to study music in earnest, after hearing music from the Baroque period and earlier, as well as music of the 20th century. Reich studied drums with Roland Kohloff in order to play jazz. While attending Cornell University, he minored in music and graduated in 1957 with a B.A. in Philosophy.