It may have been “on private vs personal property and ownership vs stewardship”, just wasn’t clear or persuasive. You are probably right, government is probably necessary for capitalism, if only to establish rule of law and line of ownership. Hard if not impossible to establish though whether a piece of property was at some time in the distant past taken by force, abandoned, never claimed, or transferred for consideration, and even if an aggrieved and uncompensated former owner could be found, that person would have access to legal remedy. The fact that such a person might exist in no way conveys ownership of that property to “everybody”. I have no problem with that nor do I particularly care what a philosophical anarchist believes. Give a philosopher enough time and paper and they can prove anything;)