Rodgers and Hammerstein changed the face of musical theatre with their groundbreaking Oklahoma! in 1943, and followed it up with their masterpiece Carousel in 1945. Both were big hits in their day, but more importantly, they secured the duo as the most influential composing team of the 1940s, with their structure and style carrying well into the 1960s and inspiring others to write musicals in a similar vein. With the security of ticket sales bolstering their future, Rodgers and Hammerstein’s next musical would be a bold step, an experiment that would stretch the form of Broadway musicals in a way that was decades ahead of its time. That was the 1947 musical Allegro.