Who said "One cannot simultaneously prevent and prepare for war."?

This quote is attributed to Sinclair Lewis.

One cannot simultaneously prevent and prepare for war. - Sinclair Lewis

"One cannot simultaneously prevent and prepare for war."

Sinclair Lewis War

Novelist American 1885–1951

"It is the nature of progress that it makes the past seem wrong."

"Don't you dare take the lazy approach and accept things as they are."

"Sincere faith is the best intellect, and the best intellect is a faith in the nobility of human nature."

"Every compulsion is put upon us by other people, hardly by ourselves."

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."