Update: here's a bit from Anarchy, Part II:
Doug: I find the concept of a necessary evil rather repugnant. It’s largely sophistry, usually trotted out to justify some type of criminality. Can anything that’s evil really be necessary? And can anything that’s necessary really be evil?
Entirely apart from that, people say the state is necessary because that’s all they’ve ever known. But it’s not, in fact, part of the cosmic firmament. There have been times and places in history when central authority was so distant, or negligent, that the people did function — and prosper — in what was essentially a functioning anarchy.