Career
He is best remembered for his politics of music He made his debut as a pianist during World War I after having been a student of Agnes Adler and Anders Rachlew. Bonnen was responsible for starting the Young Musician Society (UTS), it is now known as Young Tone Artists (DUT).
In 1932 founded and led his Opera Company of 1932.
In addition, he wrote a book about Peter Erasmus Lange-Müller.