Alexei Haieff (1913-1986) was a prominent American composer and conductor known for his contributions to classical music and contemporary composition. Born in Russia, he emigrated to the United States in the 1920s, where he became a significant figure in the American music scene. Haieff's music is characterized by a blend of traditional classical elements and innovative modern techniques, often incorporating dissonance and complex rhythms. He was influenced by the European avant-garde while also reflecting American musical idioms. Notable works include his orchestral pieces, chamber music, and operas, such as "The Devil and Daniel Webster" and "The Great Gatsby." His impact on music extends beyond his compositions; Haieff was also an influential educator, teaching at various institutions, including Brooklyn College and the Manhattan School of Music. He was known for mentoring younger composers and promoting new music through performances and festivals. Throughout his career, Haieff contributed to the evolution of American classical music, bridging the gap between European traditions and contemporary styles, making him a noteworthy figure in the 20th-century music landscape.