Passage explication

In this passage, from Chapter 5 of Slaughter House Five, the author explores the comparison of science fiction to the rest of the books theme which is Free will and the destruction of war. In this comparison he uses stories and literary devices such as repetition to explain the importance of free floating ideas, and the horrors of war. At the entrance of the passage, the author is making an attempt at comparing free will to science fiction in that he starts of by saying "Rosewater who introduced Billy to science fiction". The author is trying to set precedence for support of free floating circulating ideas by allowing a out of the ordinary genre of books to be an acceptable form of literature. The author used repetition to prove that war is destructive and horrible. In the middle of the passage, he says "Rosewater, for-instance, shot a fourteen-year-old fireman, mistaking him for a German soldier. So it goes" He used the saying "So it goes" to numb the audience to the horrors of war every time a abhorrent event happens.