"George Balanchine, in collaboration with Stravinsky, famously created an Americanized version of Russian classical ballet. Kurt Weill, schooled in Berlin jazz, composed a Broadway opera. Rouben Mamoulian's revolutionary Broadway productions of Porgy and Bess and Oklahoma! drew upon Russian 'total theater.' An army of German filmmakers--among them F. W. Murnau, Fritz Lang, Ernst Lubitsch, and Billy Wilder--made Hollywood more edgy and cosmopolitan....