As most of these properties of land can be put to use only by repeated and continued exertion in the same place, a large portion of the earth is necessarily apportioned to individual control, i. e., to the ownership of those who can direct its uses, and so it becomes wealth. The sea in most of its uses to men requires no such local control, and so is not owned by a nation even; but the harbors, ships and wharves, the oyster-beds and fishing banks, soon become the property of some body of men that will make and keep them useful. Even a pathway over the high seas may yet be controlled for the safety of the huge steamers that dash across. Land, except when used for absolutely universal welfare, must be under individual control, and even then other individuals may have the right of way because of its necessity in the common use. Peculiarities of property in land arising from limitations in quantity or quality will be spoken of under _Scarcity Prices_ and _Rent_. They differ from similar questions as to any other form of property only because this form of property seems more permanent. Any force of nature brought under control by individual effort contributes to wealth of individuals till all gain equal control. Peculiarities of climate affect the quality of wool, cotton, grains and fruit, and even the beef and mutton raised under it. But these effects we connect with the land. Such peculiarities also affect manufactures of various kinds, and so location has value. _Effort for gain._—Voluntary human effort is always made with the expectation of gain from its exertion; otherwise it would not be made. As Guizot says, “Our ideal is to procure the maximum of utility with the minimum of effort.” The exertion is always counted in the cost of any product, whatever the natural forces employed. If the crop fails, or the product is unsalable, the effort has lost its expected reward, and prospective losses are estimated with more or less care in judging whether a product is worth the exertion. The half crop of a droughty year costs as much as the full crop of a plenteous year, and compensation for the loss is expected from the surplus of the full crop. In estimating the exertion given, all human energies are counted, whether they belong to the present, like muscular power, good eyesight, quick intelligence; or to the past, like dexterity from training, superior knowledge, accumulated tools, established character. If the immediate exertion is most prominent, the word labor includes the whole exertion. If tools and machinery are used, capital is a contributor to the product and takes its share. If skill or knowledge or character become important, personal attainments are a chief cause of the product, and so a chief claimant in the reward. Chapter III. Labor Defined And Classified.