No fixed relation can be stated between the extent of territory and the population that are adequate one to the other, both because of the differences in the quality of land, in its fertility, in the nature of its products, and in the influence of climate, and because of the different tempers of those who inhabit it; for some in a fertile country consume little, and others on an ungrateful soil much. The greater or less fecundity of women, the conditions that are more or less favourable in each country to the growth of population, and the influence the legislator can hope to exercise by his institutions, must also be taken into account. The legislator therefore should not go by what he sees, but by what he foresees; he should stop not so much at the state in which he actually finds the population, as at that to which it ought naturally to attain. Lastly, there are countless cases in which the particular local circumstances demand or allow the acquisition of a greater territory than seems necessary. Thus, expansion will be great in a mountainous country, where the natural products, i.e.