Expressionism was a modernist movement originating in Germany in the early 20th century that sought to express inner emotional experiences rather than physical reality. In music, Expressionism explored bold colors, harsh dissonances, and a weak sense of tonality through abrupt harmonies, melodies, and harsher instrumental combinations. Two influential Expressionist composers were Arnold Schoenberg, who developed the 12-tone serialism technique of composition, and Igor Stravinsky, whose early works like The Rite of Spring ballet and The Firebird Suite featured shifting rhythms and polytonality.