which leadership role on the island does jack settle into, and what does this indicate about his character

Jack represents an autocratic dictatorship. He has no interest in society or rescue. At first Jack seems content to hunt and play his quasi-war games. Later, like many emerging democracies, the military leader is not content to work in a democracy. Jack takes control and becomes the autocratic dictator who leads by fear instead of consultation and example. By the end of the novel Jack sets himself up as sort of a God/King, “Jack, now a leader sits on a great log, painted and garlanded as an idol.” The civilized democracy of Ralph has long been forgotten.