Following the publication of his book, The State of Music, Thompson established himself in New York City as a peer of Aaron Copland, and was also a music critic for the New York Herald-Tribune from 1940 to 1954.
Efter publiceringen av hans bok, The State of Music, etablerade han sig i New York som anhängare av Aaron Copland, och var också en musikkritiker för New York Herald-Tribune 1940-54.