In the novel, Jack is jealous of Ralph. Jack wants to be chief.
“(To Ralph) ‘ And you shut up! Who are you anyway? Sitting there telling people what to do. You can’t hunt, you can’t sing-’ ‘I’m chief. I was chosen.’ ‘Why should choosing make any difference...?’” (91)
Also, in Lord of the Flies, the boys turn savage and fall to the wills of nature rather than staying true to civilization. The boys turn to little beasts.
“‘Kill the pig, cut his throat, kill the pig, bash him in!’ Ralph too was fighting to get near, to get a handful of that brown, vulnerable flesh. The desire to squeeze and hurt was over-mastering.”