If an anarchist state can organize and fight, why wouldn't they organize and enslave/steal from neighbors? Then that escalates and creates a country where the ruling anarchists steals and enslaves from the rest. The other anarchies doesn't put up a fight since fighting costs more than just giving the ruler anarchists what they want, and here the ruler anarchist state also protects the peaceful anarchists from other ruler anarchists. Can you explain how anarchies would stop this sort of hierarchy of anarchies from happening?