explain the exchange of power at the beginning of chapter 8 ?

In this chapter, Golding continues to use his main characters as personifications of various facets of the human spirit. Piggy remains the lone skeptic among the boys and still unsure of the presence of the beast, which continues to be the focus of island life for Jack and his hunters. Even Ralph, succumbing to fear and suspicion, now believes that there is a beast on the island. Although Ralph is the clear protagonist of the story and the character to whom Golding affixes the reader's perspective, he is still susceptible to the childish passions and irrationality that are, to varying extents, present in the other children. Ralph's weakness is not insignificant. While Ralph may be more mature and rational than Jack and his hunters, given the right circumstances he can submit to the same passions as the other boys, a tendency that foreshadows the tragic events that unfold in subsequent chapters.