Answer:
The new methods of warfare affected people's beliefs. The given quote reflects this change in people's beliefs towards warfare.
Step-by-step explanation:
World War I was a new kind of war waged where many nations were involved and took millions of lives. With a new kind of war came new weapons such as machine guns, poison gases, submarines, and airplane bombers.
"A Farewell to Arms" is a novel written by Ernest Hemingway. The novel is about a young American named Frederic Henry, who served as a second lieutenant in the Italian army in the war. The new era of war and new methods of warfare changed American's attitudes towards war. They became hedonists, politics became corrupted, ruthless business practices were being practiced.