Jack in LOTF character development

At the beginning of the novel Jack is a boy with principles. When we first met him in the novel, he led the choir boys. They were not allowed to take off their clothes and they must walk in two parallel rows. This shows Jack’s commitment to civilization and morality is strong. However, his character changes at the later parts of the novel as he upholds savagery. Also, the more the rules differ from the island reality, the more cruel and ruthless a person Jack turns out to be which contributed to the plot.
In Lord of the Flies, Jack is charismatic and inclined to leadership. Despite not being leader, Jack does agree with Ralph about managing the fire and that there should be more rules and offers to be responsible for the fire. When Ralph told the boys that they should have more rules Jack was supportive of Ralph and said that "We've got to have rules and obey them. After all, we're not savages. We're English, and the English are best at everything”. This reveals Jack's manipulative intent as he wants to be involved in leadership and he has seen an opportunity to get control of something very important. This will become significant later when Jack shows his true character which is morally lacking and totally savage, revealing the irony in his words.
Jack plays an important role in this novel as he is the cause of the separation between the boys. The conflict on the island begins with Jack attempting to dominate the group rather than working with Ralph to benefit it. He frequently ignores the power of the conch, declaring that the conch rule does not matter on certain parts of the island. Yet he uses the conch to his advantage when possible, such as when he calls his own assembly to impeach Ralph. For him, the conch represents the rules and boundaries that have kept him from acting on the impulses to dominate others. Their entire lives in the other world, the boys had been moderated by rules set by society against physical aggression. On the island, however, that