But while the white man is forever forbidden by the laws of his physical nature to labor, or by his own hands to grow the natural products of the tropics, he can live there, and enjoy all his faculties of mind and body with the same certainty and success that belong to the temperate latitudes. It may be that the temptations to indulgence, to voluptuousness, or to the gratification of the animal appetites, are greater in these warm and glowing climes, but surely no more so than in our own summers, compared with the winter or other less attractive seasons. On the contrary, the necessities of cleanliness and the less potent demand for stimulants, with the cooling and delicious fruits of the tropics, tend to delicacy of tastes and appetites. At all events, it is certain that the grossest, most brutal, and most immoral populations of Europe are found in the far north, while those of southern Europe are the most temperate and the most delicate in their habitudes of any people in the world. But climate has little, if any, influence in these respects. The white man under the same circumstances is the same being, and his grossness and immorality, or his delicacy, temperance, and morality, are things of chance, according as he has been educated, and circumstances, public and private, have formed his character. As a master, as the guide and protector of the subordinate negro, he may live wherever the latter can, otherwise the negro would have been created in vain—a blank in the economy of the universe, a contradiction in the designs of Providence, and a blotch on the fair form of creation. Generally speaking, climate or other external circumstances have influence over the life, either human or animal, according as they are low in the scale of being, and therefore while the Caucasian man can live and enjoy the full development of all his powers in the tropics, the negro and other inferior races are absolutely limited to their own centres of existence. The Mongols have been confined to those portions of Asia where they now exist, ever since known to history, for though in the mighty invasions of Genghis Khan, Tamerlane, and others, when millions of them spread like a flood over other regions, and even as far as Chalons, in France, they almost as rapidly receded, and are now just where history first found them.