capitalism

you confuse capitalism in general with the concept of a capitalistic nation-state, history has proven over and over that people with almost infinite money will use that money to the buy violent means to not only protect their capital but also to enforce their rule. The purest form of capitalism was never invented or made-up by mankind, it acts as a force of nature like water finding the path of least resistance. The thing is, that in history there have always been multiple owners of wealth (in our times organised in nation-states) competing against each other for power and resources. Because of that it might not seem like this capital is self-organising, but there is definitely a 'law' that makes it so that the person with all the money wins. We should be happy that not all those with wealth (and power) persue wealth (and power) at all costs. In other words, thank god most people care about other things beside money (and power).

I guess I tend to think that police, and power structures in general, are organic and will pop into existence spontaneously.

(I actually think power structures are going to be important to maintain a socialist society too, just not ones that serve the few at the cost of the many.)