Chapter 7: What terrifying discovery do the boys make at the end of the chapter? What could this be symbolic of? What could this foreshadow?

At the end of Chapter Seven, the boys come upon the dead pilot's body. Although, they do not know what it is.... to the boys, it's the beast. Even Jack and Ralph are afraid. The monster, as it seems to the boys, foreshadows what will become the complete break down of civility on the island.