The enforcement of law and order is typically the role of the police in modern states.
Among the first modern experiments in civil government took place in 1636 when Roger Williams, a Christian minister, founded the colony of Rhode Island and Providence Plantations.
[1][2] Thus four forms of authority may be seen: It can also mean the moral power of command, supported (when need be) by physical coercion, which the State does not exercise over its members.
It is natural to man to live in society, to submit to authority, and to be governed by that custom of society which crystallizes into law, and the obedience that is required is paid to the powers that be, to the authority in possession.
In modern states enforcement of law and order is typically the role of the police although the line between military and civil units may be hard to distinguish; especially when militias and volunteers, such as yeomanry, act in pursuance of non-military, domestic objectives.