In our individual countries, sets of laws are created by the citizenry and are designed to protect life, liberty, and property.
This usually comes in the form of protecting their citizenry from crime.
This would be the case in a besieged city or a nation using the food supply to keep its citizenry in check.
Further, they provide for the registry of births, marriages, and deaths of the citizenry so that, as the agents enforcing justice, they can ensure that wills are carried out and inheritances passed.
Those countries consisted of a citizenry bound by neither culture nor tradition, and that caused problems.