Could an anarcho-capitalist covenant community hypothetically have a leader? He would of course only rule over his privately owned domain and the people he rules over would voluntarily agree to live under him but could leave at any time. So long as the relationship between this ruler and his subjects was genuinely contractual and the rights of his subjects weren't being violated, could such a system exist in an ancap society? It wouldn't be a state because his governance would be uncoerced and he wouldn't tax his subjects. I see no reason why this couldn't work and I don't see how it contradicts the doctrines the anarcho-capitalism because everything would be private and voluntary.