By the two former methods man subsists on animal food. By the two latter on vegetable food.
Northern and southern climes.
Animal food in arctic regions.
As we go north, from the temperate regions toward the poles, man is found to subsist more and more on animal food. This seems to be the intention of Providence. In the arctic regions scarcely any vegetables grow that are fit for human food, but animals whose flesh is nutritious and adapted to the use of man are abundant.
As we go south, from temperate regions toward the equator, man is found to subsist more and more on vegetable food. This, too, seems to be the intention of nature. Within the tropics scarcely any animals live that are fit for human food; while fruits, roots, and other vegetable productions which are nutritious and adapted to the use of man are abundant.
In accordance with this difference in the productions of the different regions of the earth, there seems to be a difference in the constitutions of the races of men formed to inhabit them. The tribes that inhabit Greenland and Kamtschatka can not preserve their accustomed health and vigor on any other than animal food. If put upon a diet of vegetables they soon begin to pine away. The reverse is true of the vegetable-eaters of the tropics. They preserve their health and strength well on a diet of rice, or bread-fruit, or bananas, and would undoubtedly be made sick by being fed on the flesh of walruses, seals, and white bears.
Tropical regions.
Appetite changes with climate.
In the temperate regions the productions of the above-mentioned extremes are mingled. Here many animals whose flesh is fit for human food live and thrive, and here grows, too, a vast variety of nutritious fruits, and roots, and seeds. The physical constitution of the various races of men that inhabit these regions is modified accordingly. In the temperate climes men can live on vegetable food, or on animal food, or on both. The constitution differs, too, in different individuals, and it changes at different periods of the year. Some persons require more of animal, and others more of vegetable food, to preserve their bodily and mental powers in the best condition, and each one observes a change in himself in passing from winter to summer. In the summer the desire for a diet of fruits and vegetables seems to come northward with the sun, and in the winter the appetite for flesh comes southward from the arctic regions with the cold.
When we consider the different conditions in which the different regions of the earth are placed in respect to their capacity of production for animal and vegetable food, we shall see that this adjustment of the constitution of man, both to the differences of climate and to the changes of the seasons, is a very wise and beneficent arrangement of Divine Providence. To confine man absolutely either to animal or vegetable food would be to depopulate a large part of the earth.
First steps toward civilization.