Читать книгу Principles of Sociology - Spencer Herbert - Страница 17

Life in general is possible only between certain limits of temperature; and life of the higher kinds is possible only within a comparatively-narrow range of temperature, maintained artificially if not naturally. Hence social life, presupposing as it does not only human life but that life vegetal and animal on which human life depends, is restricted by certain extremes of cold and heat.

Cold, though great, does not rigorously exclude warmblooded creatures, if the locality supplies adequate means of generating heat. The arctic regions contain various marine and terrestrial mammals, large and small; but the existence of these depends, directly or indirectly, on the existence of the inferior marine creatures, vertebrate and invertebrate, which would cease to live there did not the warm currents from the tropics check the formation of ice. Hence such human life as we find in the far north, dependent as it is mainly on the life of these mammals, is also remotely dependent on the same source of heat. But where, as in such places, the temperature which man's vital functions require can be maintained with difficulty, social evolution is not possible. There can be neither a sufficient surplus-power in each individual nor a sufficient number of individuals. Not only are the energies of an Esquimaux expended mainly in guarding against loss of heat, but his bodily functions are greatly modified to the same end. Without fuel, and, indeed, unable to burn within his snow-hut anything more than an oil-lamp, lest the walls should melt, he has to keep up that warmth which even his thick fur-dress fails to retain, by devouring vast quantities of blubber and oil; and his digestive system, heavily taxed in providing the wherewith to meet excessive loss by radiation, supplies less material for other vital purposes. This great physiological cost of individual life, indirectly checking the multiplication of individuals, arrests social evolution. A kindred relation of cause and effect is shown us in the Southern hemisphere by the still-more-miserable Puegians. Living nearly unclothed in a region of storms, which their wretched dwellings of sticks and grass do not exclude, and having little food but fish and mollusks, these beings, described as scarcely human in appearance, have such difficulty in preserving the vital balance in face of the rapid escape of heat, that the surplus for individual development is narrowly restricted, and, consequently, the surplus for producing and rearing new individuals. Hence the numbers remain too small for exhibiting anything beyond incipient social existence.

Though, in some tropical regions, an opposite extreme of temperature so far impedes the vital actions as to impede social development, yet hindrance from this cause seems exceptional and relatively unimportant. Life in general, and mammalian life along with it, is great in quantity as well as individually high, in localities that are among the hottest. The silence of the forests during the noontide glare in such localities, does, indeed, furnish evidence of enervation; but in cooler parts of the twenty-four hours there is a compensating energy. And if varieties of the human race adapted to these localities, show, in comparison with ourselves, some indolence, this does not seem greater than, or even equal to, the indolence of the primitive man in temperate climates. Contemplated in the mass, facts do not countenance the current idea that great heat hinders progress. All the earliest recorded civilizations belonged to regions which, if not tropical, almost equal the tropics in height of temperature. India and Southern China, as still existing, show us great social evolutions within the tropics. The vast architectural remains of Java and of Cambodia yield proofs of other tropical civilizations in the East; while the extinct societies of Central America, Mexico, and Peru, need but be named to make it manifest that in the New World also, there were in past times great advances in hot regions. It is thus, too, if we compare societies of ruder types that have developed in warm climates, with allied societies belonging to colder climates. Tahiti, the Tonga Islands, and the Sandwich Islands, are within the tropics; and in them, when first discovered, there had been reached stages of evolution which were remarkable considering the absence of metals.

I do not ignore the fact that in recent times societies have evolved most, both in size and complexity, in temperate regions. I simply join with this the fact that the first considerable societies arose, and the primary stages of social development were reached, in hot climates. The truth would seem to be that the earlier phases of progress had to be passed through where the resistances offered by inorganic conditions were least; that when the arts of life had been advanced, it became possible for societies to develop in regions where the resistances were greater; and that further developments in the arts of life, with the further discipline in co-operation accompanying them, enabled subsequent societies to take root and grow in regions which, by climatic and other conditions, offered relatively-great resistances.

We must therefore say that solar radiation, being the source of those forces by which life, vegetal and animal, is carried on; and being, by implication, the source of the forces displayed in human life, and consequently in social life; it results that there can be no considerable social evolution on tracts of the Earth's surface where solar radiation is very feeble. Though, contrariwise, there is on some tracts a solar radiation in excess of the degree most favourable to vital actions; yet the consequent hindrance to social evolution is relatively small. Further, we conclude that an abundant supply of light and heat is especially requisite during those first stages of progress in which social vitality is small.