Answer:
Composer/Lyricist - Irving Berlin
Step-by-step explanation:
Irving Berlin wrote the song "God Bless America" while serving in World War I in 1918. While not American, Berlin is considered one of the greatest songwriters of all time and has had a major impact on the world of song writing. Berlins work has a big role in the book called "the Great American Songbook" where a good amount of his work can be found.
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