how can you have private property without a state forcing everyone to respect that your name is written on a piece of paper that says it’s yours? we are social beings. in situations where authority collapses, as in natural disasters, the collapse of property relations soon follows.
the right-libertarian misconception that property is a natural, fundamental law that pre-exists all of human society is a fantasy – you are not going to hoard your 50 acres of farmland for yourself while your neighbors starve just because you have a large gun collection. And the right-libertarian solution to this obvious problem is that they would simply create the state again, but with them at the top, by hiring mercenaries to shoot anyone who climbs the fence. That is what the state is at its core: maintenance of property relations. Communism and anarchism aren’t opposites, but synonyms.