How did Aaron Copland's music reflect nationalism?

Aaron Copland's music reflects nationalism through its incorporation of American folk themes, rhythms, and harmonies, which evoke the vast landscapes and diverse cultural heritage of the United States. His use of traditional American melodies and styles, as heard in works like "Appalachian Spring" and "Fanfare for the Common Man," helped to create a distinctly American sound. Copland aimed to connect with the American public by expressing shared values and experiences, making his music accessible and resonant with national identity.