Anarchy would never ever ever work. Human nature is not anarchical but hierarchical.
Human nature is self destructive.
when ever people make categorical claims about human nature, they are almost always talking about themselves.
I agree, but I also believe it's difficult to escape this bias, as people rarely experience any life but their own; only ~18% of the population are both intuitive and highly empathetic, who can easily walk in the shoes of another human being. It's better to just discard the argument of human nature, it rarely provides any insight except "Humans do this and therefore it's in their nature," which we were aware of even before the argument was presented.