Okay, I need a good thesis and topic sentences for my essay on lord of the flies.

The prompt is:
"William Golding has stated his novel is 'an attempt to trace the defects of society back to the defects of human nature.' Explain how each of the four main characters (Jack, Ralph, Piggy, and Simon) represents a type of a person in our civilized society. Analyze how each character functions in the development of Goldin's theme."

I need one topic sentence for each character.

We can't do your homework for you here. However, we can advise you in how you might do your homework and understand what you are doing after you have shown some effort on your own part to do your homework.

In light of the foregoing, what would you think might be good thesis topic sentences for each character?