From the beginning Ralph wants an order to their new "society," which is why he wants to use the conch. It symbolizes that order, giving anyone who holds it--and only those who hold it the right to speak at meetings. He wants huts built, latrines used; he wants a fire to allow rescue. He has a real sense of responsibility and worries about others and things going right. Jack, however, eschews such democratic style of leadership. When he forms his own tribe, he is the "chief" and wants to be referred to as such. For him brute force, not intelligence, brings structure, which is chaos, which we see when violence runs rampant and Simon is killed.