Now I'm confused. You posted a link to a state that existed from 930 to 1262 as evidence of the viability of a system invented by a guy born in 1819. Did Gustave invent anarcho-capitalism, or the time machine?
I'd expect better respect for freedom from someone with "Amagi" as their user pic... You said that running defense and justice on the free market had never been tested. I showed you when it had. Worked for even longer than the republics that have been tested so far. Gustave de Molinari simply put that together with ideas from his contemporaries, and came to the quite reasonable conclusion that if a monopoly is bad in one sector of the economy, it's bad in
every sector. Market competition ensures fairness in the pricing and dispensation of produce, and it will (and has) ensured fairness in the pricing and dispensation of protection and justice.
Meh. 50,000 (very homogenous) people on an island is hardly a test. Proof of concept, maybe. Also,
see here.
And most of his detractors don't take his assumptions on faith. Justice and defense aren't necessarily "sectors of the economy".
Just one example, in the USA the justice system is creaky and inefficient
by design because a group of people were horrified by the efficient systems they had seen elsewhere in the world. It is a price that they (and we) were willing to pay. It may be possible for a market to produce the same or better outcome for less cost, but it is not at all obvious.