How is jack characterized for the reader?

Jack is characterized as a charismatic but increasingly savage leader who revels in power and control. Initially portrayed as confident and ambitious, his descent into brutality highlights his primal instincts and desire for dominance. His transformation reflects the broader themes of civilization versus savagery, showcasing how power can corrupt and dehumanize individuals. Ultimately, Jack embodies the darker aspects of human nature, becoming a symbol of chaos and moral decline.