When Ralph was looking around with piggy they found a conch and Ralph told piggy that they can use this to call the others. [They can] have a meeting and they'll come when they hear us(pg 16). This shows the order that Ralph wants to have on the island.
When Ralph is trying to keep everything organized and people start to not listen he yells, "you hunters! you can laugh! the smoke is more important than the pig!" trying to get people to listen and he starts to show his agression
Then in the end, "Piggy and Ralph found themselves eagerly to take place in this demented but pertly secure society" and they ended up killing Simon and Ralph enjoyed it. This shows he has fully crossed to being evil.