In chapter 11 of Lord of the Flies, Describe Piggy's speech he plans to give.

Piggy tries his best to appeal to any remnants of humanity left in the boys.

Here is a good quote,

"I won't ask for my glasses back as a favour. I won't ask Jack to be a sport, I'll say not because he's strong but because what's right's right." His speech is the epitome of rationality and truth. Unfortunately both these traits have died in the boys.