Throughout the book, how does Jack's character change? What are some quotes that demonstrate this change?

In the beginning of the novel Jack desires power and is furious when he loses the election to Ralph, however, he retains the values of civilized behavior that he had as the leader of the choirboys in school. He is unable to kill a pig the first time he encounters one, however, as the book continues he becomes obsessed with hunting and goes beyond hunting for food, to painting his face and killing for the rush. Jack becomes more savage and instinctual, leaving behind the values of propriety and civilization. He uses fear of the beast to control the other boys and becomes the book’s representation of savagery, violence, and the all encompassing desire for power.