DeHaven was born in 1895 in
Brooklyn,
New York. His father was a steel worker and inventor. He attended
Fessenden School in
West Newton,
Massachusetts from 1906 to 1909 before attending
The Hill School in Pottstown, Pennsylvania from 1909 to 1914. Following graduation DeHaven attended
Cornell University from 1914 to 1915, and
Columbia University from 1915 to 1916. He tried to join the
US Army Air Corps in 1916, but was rejected. He joined the
Royal Flying Corps Canada in
Toronto,
Ontario, Canada. While training as a pilot during the
First World War, DeHaven survived a plane crash. While recuperating from a ruptured pancreas, he tried to understand why he, and only he, survived that crash, noting that his cockpit was the only one that remained intact. ==Early work==