History of Civilization in England, Vol. 1 of 3. Henry Buckley

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СКАЧАТЬ was peopled by wild and ignorant barbarians. Such an inquiry will be found highly interesting, as affording further proof of the extraordinary, and indeed irresistible, force with which the powers of nature have controlled the fortunes of man.

      The first circumstance by which we must be struck, is that in America, as in Asia and Africa, all the original civilizations were seated in hot countries; the whole of Peru proper being within the southern tropic, the whole of Central America and Mexico within the northern tropic. How the heat of the climate operated on the social and political arrangements of India and Egypt, I have attempted to examine; and it has, I trust, been proved that the result was brought about by diminishing the wants and requirements of the people, and thus producing a very unequal distribution of wealth and power. But, besides this, there is another way in which the average temperature of a country affects its civilization, and the discussion of which I have reserved for the present moment, because it may be more clearly illustrated in America than elsewhere. Indeed, in the New World, the scale on which Nature works, being much larger than in the Old, and her forces being more overpowering, it is evident that her operations on mankind may be studied with greater advantage than in countries where she is weaker, and where, therefore, the consequences of her movements are less conspicuous.

      If the reader will bear in mind the immense influence which an abundant national food has been shown to exercise, he will easily understand how, owing to the pressure of physical phenomena, the civilization of America was, of necessity, confined to those parts where alone it was found by the discoverers of the New World. For, setting aside the chemical and geognostic varieties of soil, it may be said that the two causes which regulate the fertility of every country are heat and moisture.171 Where these are abundant, the land will be exuberant; where they are deficient, it will be sterile. This rule is, of course, in its application subject to exceptions, arising from physical conditions which are independent of it; but if other things are equal, the rule is invariable. And the vast additions which, since the construction of isothermal lines, have been made to our knowledge of geographical botany, enable us to lay this down as a law of nature, proved not only by arguments drawn from vegetable physiology, but also by a careful study of the proportions in which plants are actually distributed in different countries.172

      A general survey of the continent of America will illustrate the connexion between this law and the subject now before us. In the first place, as regards moisture, all the great rivers in the New World are on the eastern coast, none of them on the western. The causes of this remarkable fact are unknown;173 but it is certain that neither in North, nor in South America, does one considerable river empty itself into the Pacific; while on the opposite side there are numerous rivers, some of enormous magnitude, all of great importance, as the Negro, the La Plata, the San Francisco, the Amazon, the Orinoco, the Mississippi, the Alabama, the Saint John, the Potomac, the Susquehannah, the Delaware, the Hudson, and the Saint Lawrence. By this vast water-system the soil is towards the east constantly irrigated:174 but towards the west there is in North America only one river of value, the Oregon;175 while in South America, from the Isthmus of Panama to the Straits of Magellan, there is no great river at all.

      But as to the other main cause of fertility, namely heat, we find in North America a state of things precisely the reverse. There we find that while the irrigation is on the east, the heat is on the west.176 This difference of temperature between the two coasts is probably connected with some great meteorological law; for in the whole of the northern hemisphere, the eastern part of continents and of islands is colder than the western.177 Whether, however, this is owing to some large and comprehensive cause, or whether each instance has a cause peculiar to itself, is an alternative, in the present state of knowledge, impossible to decide; but the fact is unquestionable, and its influence upon the early history of America is extremely curious. In consequence of it, the two great conditions of fertility have not been united in any part of the continent north of Mexico. The countries on the one side have wanted heat; those on the other side have wanted irrigation. The accumulation of wealth being thus impeded, the progress of society was stopped; and until, in the sixteenth century, the knowledge of Europe was brought to bear upon America, there is no instance of any people north of the twentieth parallel, reaching even that imperfect civilization to which the inhabitants of India and of Egypt easily attained.178 On the other hand, south of the twentieth parallel, the continent suddenly changes its form, and, rapidly contracting, becomes a small strip of land, until it reaches the Isthmus of Panama. This narrow tract was the centre of Mexican civilization; and a comparison of the preceding arguments will easily show why such was the case; for the peculiar configuration of the land secured a very large amount of coast, and thus gave to the southern part of North America the character of an island. Hence there arose one of the characteristics of an insular climate, namely, an increase of moisture caused by the watery vapour which springs from the sea.179 While, therefore, the position of Mexico near the equator gave it heat, the shape of the land gave it humidity; and this being the only part of North America in which these two conditions were united, it was likewise the only part which was at all civilized. There can be no doubt that if the sandy plains of California and southern Columbia, instead of being scorched into sterility, had been irrigated by the rivers of the east, or if the rivers of the east had been accompanied by the heat of the west, the result of either combination would have been that exuberance of soil by which, as the history of the world decisively proves, every early civilization was preceded. But inasmuch as, of the two elements of fertility, one was deficient in every part of America north of the twentieth parallel, it followed that, until that line was passed, civilization could gain no resting-place; and there never has been found, and we may confidently assert never will be found, any evidence that even a single ancient nation, in the whole of that enormous continent, was able to make much progress in the arts of life, or organize itself into a fixed and permanent society.

      Thus far as to the physical agents which controlled the early destinies of North America. But in reference to South America, a different train of circumstances came into play; for the law by virtue of which the eastern coasts are colder than the western, is not only inapplicable to the southern hemisphere, but is replaced by another law precisely the reverse. North of the equator, the east is colder than the west; south of the equator, the east is hotter than the west.180 If now, we connect this fact with what has been noticed respecting the vast river-system which distinguishes the east of America from the west, it becomes evident that in South America there exists that coöperation of heat and humidity in which North America is deficient. The result is, that the soil in the eastern part of South America is remarkable for its exuberance, not only within the tropic, but considerably beyond it; the south of Brazil, and even part of Uruguay, possessing a fertility not to be found in any country of North America situated under a corresponding latitude.

      On a hasty view of the preceding generalizations, it might be expected that the eastern side of South America, being thus richly endowed by nature,181 would have been the seat of one of those civilizations, which, in other parts of the world, similar causes produced. But if we look a little further, we shall find that what has just been pointed out, by no means exhausts even the physical bearings of this subject, and that we must take into consideration a third great agent, which has sufficed to neutralize the natural results of the other two, and to retain in barbarism the inhabitants of what otherwise would have been the most flourishing of all the countries of the New World.

      The agent to which I allude is the trade-wind; a striking phenomenon, by which, as we shall hereafter see, all the civilizations anterior to those of Europe were greatly and injuriously influenced. This wind covers no less than 56° of latitude; 28° north of the equator, and 28° south of it.182 СКАЧАТЬ