Oscar Hammerstein II Mathias by his first wife, and James Hammerstein by his second wife, with whom he also had a stepdaughter, Susan Blanchard. Hammerstein was one of the most important "book writers" in Broadway history – he made the story, not the songs or the stars, central to the musical and brought musical theater to full maturity as an art form. According to Stephen Sondheim, "What few people understand is that Oscar's big contribution to the theater was as a theoretician, as a Peter Brook, as an innovator. People don't understand how experimental "Show Boat" and "Oklahoma!" felt at the time they
Oscar Hammerstein II Sound of Music", as well as the musical film "State Fair" (and its stage adaptation of the same name), and the television musical "Cinderella", all featured in the revue "A Grand Night for Singing". Hammerstein also wrote the book and lyrics for "Carmen Jones", an adaptation of Georges Bizet's opera "Carmen" with an all-black cast that became a 1943 Broadway musical and a 1954 film. An active advocate for writers's rights within the theatre industry, Hammerstein was a member of the Dramatists Guild of America. In 1956, he was elected as the eleventh president of the non-profit organization. He continued