Anarcho-collectivists, which as far as I understand, represents the dominant modern anarchistic philosophy, examine alternative methods to central government for generating laws. So they don't argue for an unregulated society - which is obviously a non-starter under the lens of reality - or a return to pre-government, but rather a complete replacement of the law-making mechanism.

Basically, they're all over complexity theory and how to use strong local interactions to develop self-organising non-local societies. Which I personally think makes anarcho-collectivism possibly the most sophisticated and futuristic of current political models. They were two decades ahead of the "localism" and "direct democracy" ideologies, and with a far better understanding of the maths.