Igor Stravinsky was one of music's truly epochal innovators; no other composer of the 20th century exerted such a pervasive influence or dominated his art in the way that Stravinsky did during his seven-decade musical career. Aside from purely technical considerations such as rhythm and harmony, the most important hallmark of Stravinsky's style is, indeed, its changing face. Emerging from the spirit of late Russian nationalism and ending his career with a thorny, individual language steeped in 12-tone principles, Stravinsky assumed a number of aesthetic guises throughout the c...