How did Aaron Copland influence the world?

Aaron Copland was born in 1900.Aaron Copland was a composer and a conducter. He taught many young composers. Aaron learned the piano from his older sister. Aaron Copland taught young composers in Paris. He never got married. He made a lot of pieces. Some of them were The Appalachian spring, Simple Gifts, and Hoe down. Aaron Copland died on December 2, 1990.