Help with Questions to All Quiet On The Western Front: Paul Baumer says at one point in his narrative

Paul Baumer says at one point in his narrative that: . . . Two years of shells and bombs—a man won’t peel that off as easy as a sock. We agree that it’s the same for everyone; not only for us here. But everywhere for everyone who is our age; to some more, and to others less. It is the common fate of our generation. Albert expresses it : ‘The war has ruined us for everything.’ He is right. We are not youth any longer. We don’t want to take the world by storm. We are fleeing. We fly from ourselves. From our life. We were eighteen and had begun to love life and the world; and we had to shoot it to pieces. The first bomb, the first explosion, burst in our hearts. We are cut off from activity, from striving, from progress. We believe in such things no longer, we believe in the war. (87 – 88).

How does this feeling of being cut‐off from the rest of the world come about? How much of this feeling is due to the war? How much is due to a rite of passage that everyone feels as a teenager?