Imagine the suffering of the world if the United States turned even more 'evil' - with such a nuclear and technological arsenal we have a duty to the rest of the world to ensure that no tyranny takes root here.
False, you are going to be comfy enough to not start a civil war. Civil wars only start when a government abuse its own people; the American government tries to avoid this but is not very good at it. The abused are usually foreign countries and America have invested way too much money and people in military to be defeated by any other.