Leonard Bernstein was an American conductor, composer, pianist, music educator, author, and humanitarian. Among the most important conductors of his time, he was also the first American conductor to receive international acclaim. According to music critic Donal Henahan, he was "one of the most prodigiously talented and successful musicians in American history".
As a composer he wrote in many styles, including symphonic and orchestral music, ballet, film and theatre music, choral works, opera, chamber music and works for the piano. His best-known work is the Broadway musical West Side Story, which continues to be regularly performed worldwide, and was made into an Academy Award–winning feature film. His works include three symphonies, Chichester Psalms, Serenade after Plato's "Symposium", the original score for the film On the Waterfront, and theater works including On the Town, Wonderful Town, Candide, and his MASS.
Bernstein was the first American-born conductor to lead a major American symphony orchestra. He was music director of the New York Philharmonic and conducted the world's major orchestras, generating a significant legacy of audio and video recordings.