For the entire book, Piggy has been ignored and not treated that well. Nobody cared about him or his ideas, but when he is dead, Ralph notices and realizes how important he was. Piggy's symbolism has become quite clear over the course of the book; he represents civilization. Golding, I believe, was trying to show how people take civilization for granted and that no one really appreciates until it's gone. Now with Piggy gone, the entire island is chaos. While some may argue this isn't the most important quote in the two chapters, it still is a small reference for taking things for
