no they didn't. They built walls to stop the population fleeing into the surrounding hills.

Re police I think you should look into the history of them. Peelan policing as an ideal has some neat ideas but it was still essentially a compromise with aristocracy. It's very interesting.

No police doesn't mean no safety shit. I have arthritic thumbs and my dog is freaking out in storm, Angela Davis writes interesting things about modern cops if curious. a bit usa centric but interesting nonetheless.