Ralph is an active participant in the "game". What point about group mentality does Golding illustrate in this scene?

The involvement of Piggy and Ralph in Simon's death makes clear that even these two, the paragons of rationality and maturity among the children on the island, are susceptible to the same forces that motivate Jack and his hunters. Golding obscures the once-clear dichotomy between the "good" Ralph and the "evil" Jack, demonstrating that the compulsion towards violence and destruction is present inside all individuals. The reverse, a "good" Jack, is rarely in evidence. The implication of Ralph's and Piggy's brief but tragic participation in the brutal activities of Jack's tribe is that the natural state of humanity is neither good nor evil but mixed. Social order and rules, with conscience and reason helping out only on occasion, are what constrain and limit the "evil" impulses that exist inside us all.