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
Arthur Hammerstein productions were "Luana" and "Ballyhoo" in 1930, which were considered failures. Hammerstein suffered bankruptcy in 1931 due to some musical failures and went into retirement. In 1925-1927 Hammerstein built what is now known as the Ed Sullivan Theater at 1697 Broadway in Manhattan. Hammerstein made an appearance as himself in an episode of the film series "Popular Science" in 1949. He was one of the writers of the song "Because of You," a major hit (#1 for 10 weeks) for Tony Bennett in 1951. Hammerstein wrote the song in 1940. It was used in the film "I Was an American