Note 86 — XVI. POPULATION.

Sir James Steuart of Coltness, whose Inquiry into the Principles of Political Economy was published in 1767, nine years before the appearance of Adam Smith’s great work, takes the very same view of the principle of population which Malthus, thirty years afterwards, more formally enunciated. “The generative faculty,” says Sir James Steuart, “resembles a spring loaded with a weight, which always exerts itself in proportion to the diminution of resistance. When food has remained some time without augmentation or diminution, generation will carry numbers as high as possible; if, then, food come to be diminished, the spring is overpowered, the force of it becomes less than nothing, inhabitants will diminish, at least in proportion to the overcharge. If, on the other hand, food be increased, the spring will begin to exert itself in proportion as the resistance diminishes, people will begin to be better fed, they will multiply, and, in proportion as they increase in numbers, the food will become scarce again.”—Translator.