As per John Locke, the absence of government and the society on which it is built, means more and more urban areas revert to the State of Nature. In the State of Nature, the executive power resides in everyone to enforce the Law of Nature. The first Law of Nature is self-preservation, which requires a gun.
Pretty close. Individuals quickly organize into small bands (gangs) that are proto tribes, and enforce protection via vendetta and feud.