Need help with a "The Adventures of Huckleberry Finn" discussion question?

Casting an "innocent" or an "outsider" into a modern, sophisticated world in order to skewer certain aspects of that society is not a new idea. Think of some more examples of books or movies that shows the flaws of the modern world through the eyes of an innocent, a child, or an outsider. WHat effect does this produce? What effect is Twain able to achieve by telling this story completely from the prospective of Huckleberry Finn?