Even an anarchy needs organizations to provide security, legal judgment, roads, etc. and to prepare large-scale plans and arrangements. Probably, for the sake of efficiency and harmony, there should also be organizations to coordinate other organizations.
Furthermore, because of the complexity of society, people can't get involved in all the decision making work of these organizations – they don't have enough time and enough expertise. So they need to elect representatives.
Am I right here? If so, what is the difference between this structure and a state?