If every individual is fully independent and self sufficient everyone needs land to grow potatos and go to bed. You can't be truly independent. Anarchist society is inherently contradictory because society means having rules and standards we all have to abide by. If everyone is that independent then who is making the building they're sharing in your example? Are they all just sort of taking care of their own corner? And when the boundaries conflict? Major structural damage, who pays to fix that? If the resources can't be found then some just get wet when the roof leaks? Independence is bunk. Dependency is bunk.Interdependence has a chance of working. Anarchy is just a libertarian wet dream about existing in a vacuum with infinite resources. Instead of trying to create a hypothetical null set civilization we could improve the one that exists, and that allows for MASSIVE changes but they all presuppose that we agree collective society is a good thing.