The cartels filled the vacuum left by the state. This is exactly my point. Have a look what ancap looks like in real life in the link below.

https://twitter.com/BNONews/status/1284577448332603392

I may differ from most ancaps in this respect, but I don’t think so - I don’t expect that we could flip a switch tomorrow, eliminate the state, and live in peace. In most places, it would be violent chaos.

The key thing to implement a stateless society is to change the root expectation that a central authority is a necessity. That happens over generations, piece by piece.

I don’t want to overthrow governments - I want them to wither away due to lack of interest.

Why the capitalist part?

It's a differentiator from "pure" anarchy (which is opposed to hierarchy in relationships) and the other more specific subsets like anarchy-communism (which rejects private property).

The idea that is shared is that individuals own themselves, and therefore own the product of themselves.