Huh, so no more levels? ok, I'll write here.

Well, those are reasonable arguments, elriel. But this question highlights one of the big problems with anarchy: most people would probably behave sensibly in an anarchic environment; but not everyone can take care of themselves. Some would make some decisions which would be really bad for them. At times, very widespread drug abuse (of alcohol, in particular) have been a major social problem for certain countries (Russia, Sweden, etc). Having some government funded program to at least work with information, and helping addicts get off their drugs etc, seems reasonable. But then the list of things we want a state to do needs to be expanded. Indeed, I think most laws and most of the tasks our states have taken on to handle (besides keeping a military and policing) are justifiable, at least in principle. What about schools, for instance? Some basic education is mandatory in most countries. That's another thing I think is justifiable (mainly because I am not fond of parents brain-washing their kids, and that sort of stuff).