Marc Blitzstein (1905-1964) was an American composer and lyricist known for his contributions to musical theater and opera. He is most recognized for his work in the genre of musical theater, particularly for weaving social and political themes into his compositions. One of Blitzstein's most notable works is "The Cradle Will Rock" (1937), a groundbreaking musical that addressed issues of labor rights and class struggle during the Great Depression. The show was produced in a unique context, as it was performed during a time when the federal government attempted to suppress it, leading to a famous performance in which the audience was encouraged to sing along with the actors who could not perform on stage. Blitzstein also adapted Bertolt Brecht's "The Threepenny Opera" into English, making it more accessible to American audiences. His other significant works include "Regina," an opera based on Lillian Hellman's play "The Little Foxes." His impact on music lies in his ability to blend