Comment by praxeologist

While states dominate history, private law has proven successful. You could see the Law Merchant throughout Europe as one example or medieval Iceland, where civil order was maintained for longer than the US has existed so far, as another.

https://en.wikipedia.org/wiki/Lex_mercatoria

https://mises.org/library/medieval-iceland-and-absence-gover...

Regarding your other concerns see points 8 & 6 here:

http://c4ss.org/content/13612

While I have some differences with this author, you could consider this video as well:

https://www.youtube.com/watch?v=jTYkdEU_B4o