*sigh* I have already told you (more than once, at this point) that such things cannot be "proven" (regardless whether you take the Statist side or the Anarchist side) - and I have told you why ...
Nevertheless, you persist in trying to invoke bogus "historical" proof(s) - this time by asserting that "Anarchy is the new kid at school" (thereby implying that some kind of "historical" evidence or proof(s) countervail against "new" anarchist premises). So yet again, I point out that your (implicit) premise is both (1) demonstrably unhistorical (since stateless human society necessarily existed prior to the first State - in other words, anarchy is NOT the new kid at school - it is in fact the "shcool's" oldest graduate - and this is just the most basic and obvious among many historical counter-illustrations), and (2) even if it were historically accurate, it still would not "prove" (or even serve as evidence) for your position.
More fundamentally, YOU are the one making sweeping assertions about what cannot possibly happen or what absolutely must happen under such-and-such circumstances. Hence, any burden of proof is on YOU - not I. I have merely pointed out the fallacies and flaws of your statements. The only point at which I have attempted to support a positive claim of my own was in my previous post - and my argument in that case rested not on historical contingencies but on existential necessities.