> The term state refers to a form of polity that is typically characterised as a centralized organisation. There is no single, undisputed definition of what constitutes a state.[1][2] A widely-used definition is a state being a polity that, within a given territory, maintains a monopoly on the use of force, but many other widely used definitions exist.[3][4]

https://en.wikipedia.org/wiki/State_(polity)

It is probably the most common definition. As per this definition, the citizens can use force because the state grants them that right.