Another interesting book for those who are curious about these topics is The Private Production of Defense by Hans Hoppe which is also available for free: https://mises.org/library/private-production-defense
Ending the War on Drugs is a great step in the right direction and make sense any way you look at it, but it will not end the systematic abuses of power perpetrated by the State.
Likewise, in a contract republic (or a charter city) individuals will agree to a neutral third party to arbitrate between them if they ever have a disagreement. This can be anyone from a spiritual authority they both respect, an authority in their industry, or a private court that's built a reputation for fairness, promising to pay the private court a percentage of any arbitration settlement they bring before it.
And if the court as much as makes one unfair ruling, it will drive away new business from parties who want a neutral third party. In a contract republic, individuals will be free to have their case judged by any judge, as long as both parties agree beforehand.
Opening the justice market will make sure crime gets punished, expedite justice, and reduce its cost.
If, instead of studying libertarian theory, you study history deeply, you’ll find that there is no magical distinction between private actors and government, and that when you rely on non-governmental actors to provide things like defense without a more powerful government to constrain them, that positions allows them to become a government.
> And if the court as much as makes one unfair ruling, it will drive away new business from parties who want a neutral third party.
No one wants a neutral third party, everyone wants someone that is biased towards them but which the opposing party can be conned into believing is not.
Neutral is just what you would get, were such a market viable, when both sides happen to have equal success. (Which outside of naive assumptions about perfect information, is unlikely to be normal in practice.)