There has been a steady tendency for the education of children to be regarded as properly a state charge in spite of the fact that children are primarily the care of a family. But the period in which education is possible to an effective degree is that of childhood; if this time is not taken advantage of the consequences are irreparable. The neglect can rarely be made up later. In the degree, then, that a certain measure of instruction and training is deemed to have significant consequences for the social body, rules are laid down affecting the action of parents in relation to their children, and those who are not parents are taxed--Herbert Spencer to the contrary notwithstanding--to maintain schools. Again, the consequences of neglect of safeguards in industries involving machines which are dangerous and those presenting unhygienic conditions, are so serious and irretrievable that the modern public has intervened to maintain conditions conducive to safety and health. Movements which aim at insurance against illness and old-age under governmental auspices illustrate the same principle. While public regulation of a minimum wage is still a disputed matter, the argument in behalf of it appeals to the criterion stated. The argument in effect is that a living wage is a matter of such serious indirect consequences to society that it cannot be safely left to the parties directly concerned, owing to the fact that immediate need may incapacitate one party to the transaction from effective bargaining. In what has been said there is no attempt to lay down criteria to be applied in a predetermined way to ensure just such and such results. We are not concerned to predict the special forms which state action will take in the future. We have simply been engaged in pointing out the marks by which public action as distinct from private is characterized. Transactions between singular persons and groups bring a public into being when their indirect consequences--their effects beyond those immediately engaged in them--are of importance. Vagueness is not eliminated from the idea of importance. But at least we have pointed out some of the factors which go to make up importance: namely, the far-reaching character of consequences, whether in space or time; their settled, uniform and recurrent nature, and their irreparableness. Each one of these matters involves questions of degree. There is no sharp and clear line which draws itself, pointing out beyond peradventure, like the line left by a receding high tide, just where a public comes into existence which has interests so significant that they must be looked after and administered by special agencies, or governmental officers. Hence there is often room for dispute. The line of demarcation between actions left to private initiative and management and those regulated by the state has to be discovered experimentally.