After WWIII the only form of government is tribal law. Things are not only at the grass roots level the people are eating the grass roots. You can thank the democrats and especially Obama for what happens next.
Humans tend to congregate and form groups for a variety of reasons. Evidence: human history. Even in the most miserable of circumstances, humans will try and form some group effort to compete or to help each other or themselves.
As long as we're human, some types of governments will exist.
The question is WHAT government? If we keep in the direction we are headed we will possibly end up with a world governing body. Many of our politicians have already mentioned they might be open to discuss a world order. If that sounds frightening or way out there, it should. Certainly is not what this country is or ever intended to be. We need to stay alert and speak up. Many people will think this is just a lunatic theory. Unfortunately, many can't see past their own nose.