To Nick

So what you are saying is that when these "tribes" or "groups" come about, there will be no need for control.  Going back to the quote that you used, "man is by nature a political animal."  Being a political animal, humans will have the need for power.  These tribe would inevitably start wars. This is based on the rules of the state of nature.  Without control, they would start wars because they would be following the state of nature.  There is no scenario that you can give me that wont end in humans causing chaos because they were given the state of nature.