Have you ever seen that old movie The Purge? That's anarchy at its finest.
See, without government your police, fire department, and hospitals are all defunded. I've talked to police officers and military who all say that in a national event such as the fall of the government, they're going home to protect their families.
Without government, there is nothing to stop companies from dumping waste into the local water supplies, nothing to stop criminals from committing crimes. It would be pure chaos.
And perfect for whoever has the might and/or influence to set up and enforce a list of rules they and/or his community decides should be enforced. And look at that, we have a blooming hierarchy on our hands.