I like it.Not simple questions to answer and to fully answer them requires more than a PRE post, but to summarise:
1. Freely competing protection agencies that provide a set of laws in which you will be expected to comply if you are to receive their protection services
2. Through agreeing to contracts (this involves actual agreement not through some invisible social contract people pretend we currently sign)
3. They will provide these services for a fee
4. The same place we get money to pay for our existing monopoly services
5. You can choose to move to a different protection agency if you are unsatisfied with their performance or set of laws
For a more in-depth look at the issue: https://mises.org/library/idea-private-law-society
Plenty of freedom and opportunity for everyone.
Too much of a monopoly is a bad thing.
I guess each protection agency can choose their money System ... to pay the fee in point 3 can be in all different currencies, given rise to trading across cash, cryptocurrencies and gold and other commodities.
Of course We suspect that Brodders 17 will Continue with his destructive ways... land grabs, killing of Man and childs, territorial Conquest.
I guess that he will call himself Chief.
No doubt that there will be a battle of chiefs.
God help us if a chief piggy or joffa win.
Not only can We move to a different protection agency, those agencies can move and takeover.
Tribalism... its what we humans do best