Irving Berlin (1888-1989) was an immigrant songwriter who became one of America's most prolific composers, writing over 1,000 songs across musical theater, film, and popular music. His melodies were instantly singable and emotionally direct, qualities that made his work accessible to performers and audiences alike. "God Bless America," written in 1918, stands as one of his most enduring compositions and has become a second national anthem in American culture.