Okay, let's say we eradicate all forms of Government. We now have total anarchy, right?
Pretty soon we'll have groups of people trying to force their way of life onto others. (For example: Mean Christians (not the nice ones like knifegirl))
And there will be random groups saying "you can't kill people for that" or "no heroin is allowed in this area". They are governing that land.
If somebody tries to kill your parents and you stop them than you're governing them.

Kill the infidels! Save the children! Fuck is a bad word!