I'm going to say that government, in one form or the other has always existed. Even certain species other than humans have "governments" in place.I don't think it will ever be a Utopia and thats not really the point, nor is it solely the U.S government but rather government in general. Now, lets try and trace a time before government and forced laws on people, your guess is as good as mine.
As for a world without laws, it would never work because humans are animals, we have instincts, and one of those instincts is to survive by any means possible. Survival of the fittest. Why have only a little bit of something, when you can have a lot? having more would gaurantee you a longer life than some other shmuck.