Further into the book we discover there is a darker side to the wave movement, as the wave starts to take in more people and becomes unstable, people start to turn evil, the wave even brings out the darker side to David, who attacks Laurie over an argument about the wave. The rest of the school are over whelmed by the power of the wave unit and join the wave. All except Laurie, Alex and Carl who are the publishers of the grape vine which can be represented as the few people that still want democracy in the school but are being threatened and become paranoid.
The darker aspects of human nature can be shown through the characters in the novel the best example of this would be Robert billings a boy who wasn’t associated with any person in the school, people made fun of him, you even fell sympathetic