what type of leader is jack?

Jack is an autocratic tyrant. He rules through fear and intimidation. He

Just to add, Jack is also a good manipulator. He knows what the boys both fear and want to hear. Unlike Ralph who desires a constructive society, Jack prays on the boys' destructive primal instincts. The boys want to be told what to do rather than simply pitch in together; they feel the need to live in fear under a leader that they perceive as a powerful protector. Consequently Jack is more popular. In this sense Jack is certainly a more effective leader than Ralph.