4. Fahrenheit 9/11 (2004)
This film is the highest grossing documentary of all time, with a lifetime gross of over $119 million, which means a lot of people want to hear what Michael Moore has to say about 9/11 and the war on terror. The movie explores the events of September 11th, as well as the Bush Administrations actions and motives for invading Iraq. A must-see for our generation and future generations at a time when there is no end in sight for terrorism and corruption in our world.