It is a commonplace that legal agencies for protecting the persons and properties of members of a community, and for redressing wrongs which they suffer, did not always exist. Legal institutions derive from an earlier period when the right of self-help obtained. If a person was harmed, it was strictly up to him what he should do to get even. Injuring another and exacting a penalty for an injury received were private transactions. They were the affairs of those directly concerned and nobody else’s direct business. But the injured party obtained readily the help of friends and relatives, and the aggressor did likewise. Hence consequences of the quarrel did not remain confined to those immediately concerned. Feuds ensued, and the blood-quarrel might implicate large numbers and endure for generations. The recognition of this extensive and lasting embroilment and the harm wrought by it to whole families brought a public into existence. The transaction ceased to concern only the immediate parties to it. Those indirectly affected formed a public which took steps to conserve its interests by instituting composition and other means of pacification to localize the trouble. The facts are simple and familiar. But they seem to present in embryonic form the traits that define a state, its agencies and officers. The instance illustrates what was meant when it said that it is fallacy to try to determine the nature of the state in terms of direct causal factors. Its essential point has to do with the enduring and extensive consequences of behavior, which like all behavior proceeds in ultimate analysis through individual human beings. Recognition of evil consequences brought about a common interest which required for its maintenance certain measures and rules, together with the selection of certain persons as their guardians, interpreters, and, if need be, their executors.