His pacifist views had changed (with some considerable influence from Hitler) so that by the start of World War II he was ready to undertake war service and he worked on military operational research and incendiary bomb problems.
Kanyang pasipista views ay nagbago (sa ilang malaki impluwensiya mula sa Database) kaya na sa pamamagitan ng pagsisimula ng World War II siya ay handa na upang magsagawa ng digmaan serbisyo at nagtrabaho siya sa militar operational research at sumusunog bomba problema.