These, though they do not increase in the same proportion as corn, which is altogether the acquisition of human industry, yet multiply under the care and protection of men, who store up in the season of plenty what may maintain them in that of scarcity; who, through the whole year, furnish them with a greater quantity of food than uncultivated nature provides for them; and who, by destroying and extirpating their enemies, secure them in the free enjoyment of all that she provides.