how does Jack symbolize his idea of going back to our primitive selves to the rest of the islanders?

Jack 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. Jack offers hunting, chanting, violence and power: he represents the primal and the primitive which most of the boys are so easily drawn to.