The original idea behind nations and states
Human beings originally formed nations and states to improve the organization in groups and assure benefits and competitive advantages for the group. An additional goal was to establish a common basic set of rules for peaceful coexistence.
A nation/state should be a service organization to make life easier for it's citizens and provide services chosen by the citizens as well as enforce commonly accepted rules.

The minimum necessary services of a nation/state in today's world are:

All other services are optional!