"So it goes." in Chapter 2

     I first came across this phrase early in chapter one.  Skimming right over it, I did not stop to understand the meaning of it nor did i try to interpret what Vonnegut meant.  During chapter two, the phrase occured many times.  After each death, Vonnegut accompanied it with the phrase "So it goes."  Whether it was Billy's father dying in a hunting accident or Billy's mother dying from carbon monoxide, the phrase was used. 
     At the beginning of chapter two, we learn the reasoning for why the phrase is always accompanied with a death.  In Billy's letter, he wrote, "The most important thing I learned on Tralfamadore was that when a person dies he only appears to die.  When a Tralfamadorian sees a corpse, all he thinks is that the dead person is in bad condition in that particular moment, but that the same person is just fine in plenty of other moments.  Now, when I myself hear that somebody is dead, I simply shrug and say what the Tralfamadorians say about dead people, which is 'So it goes.'".
     While I read the phrase, I see it as if someone is saying "ehh so it goes" as they shrug their shoulders and move on.  The repetition of this phrase, however, acts as a tally for how many deaths have occured. It  goes back to the fact mentioned in chapter one that writting an antiwar book would be as effective as writting an antiglacier book.  Death and war are inevitable.