One of the most important quotes regarding this idea is, “They’re the only thing we have.” This refers to the rules that Ralph has set and Jack challenges them. As soon as Jack and the rest of the boys begin to disregard these rules, a more primitive side starts to show.
An Important part is that Jack at the beginning he decides he is going to be a hunter. Ralph however decides to make a fire and build shelters. Jack has already turned down the primitive part while Ralph rides the road to civilisation. This is made clear when Jack