I need help writing an essay on Laissez-faire capitalism, can some one help?

For my AP World History class I have to write an essay on a contraversial contemperary topic, I chose that if the concept of Laissez- faire capitalism is instituted in America the ecoonomy would vastly improve, I have an introduction but I need a powerful body, so if you could give me about three paragraphs giving some past succeses of laissez faire and how it could be applied to America, I would apprieciate it, some quotes from Ayn Rand, Adam Smith, or any other Laissez faire supporters would also help.