Here are five quotes  that show  a loss of morality within the characters from Lord of the Flies:

“‘Here – let me go!’ His voice rose to a shriek of terror as Jack snatched the glasses off his face” (Golding 55).

“Roger stooped, picked up a stone, aimed, and threw it at Henry – threw it to miss” (Golding 86).

“‘Kill the pig. Cut her throat. Spill her blood'” (Golding 96).

“All at once, Robert was screaming and struggling with the strength of frenzy. Jack had him by the  hair and was brandishing his knife” (Golding  164).

“‘We’ll raid them and take fire. There must be four of you; Henry and you, Robert and Maurice. We’ll put on paint and sneak up; Roger can snatch a branch while I say what I want'” (Golding 195-196).