was worth twelve dollars. But the wheat of the prairie regions can be grown, manufactured into flour, transported a thousand miles, and sold at a profit for less than five dollars a barrel. Therefore it is evidently more economical to buy flour in Minnesota than to grow the wheat and make it into flour in Massachusetts.

All these problems, and they exist without number, show that man may overcome most of the obstacles that surround him. So we find civilized man living in almost every part of the world. Tropical regions are not too scorching, nor are arctic fastnesses too cold for him. In other words, because of commerce and transportation, he can and usually does master the conditions of his environment; his intelligence enables him to do so, and his ability to do so is the result of the intelligent use of experience and education.

CHAPTER II

HOW COMMERCE CIVILIZED MANKIND

The history of western civilization is so closely connected with the development of the great routes of travel and the growth of commerce that one cannot possibly separate them. Commerce cannot exist without the intercourse of peoples, and peoples cannot be in mutual communication unless each learns from the other.

Feudalism.—When the Roman Empire fell civilization in western Europe was not on a high plane; indeed, the feudalism that followed was not much above barbarism. The people were living in a manner that was not very much unlike the communal system under which the serfs of Russia lived only a few years ago. Each centre of population was a sort of military camp governed by a feudal lord. The followers and retainers were scarcely better off than slaves; indeed, many of them were slaves. There was no ownership of the land except by the feudal lords, and the latter were responsible for their acts to the king only.

But very few people cared to be absolutely free, because they had but little chance to protect themselves; so it was the common custom to attach one's self to a feudal lord in order to have his protection; even a sort of peonage or slavery under him was better than no protection at all. A few of the people were engaged in trade and manufacture of some kind or other, and they were the only ones through whom the feudal lord could supply himself with the commodities needed for his retainers and the luxuries necessary to himself.

Each feudal estate, therefore, became a sort of industrial centre by itself, producing its own food-stuffs and much of the coarser manufactures. It was not a very high condition of enlightenment, but it was much better than the one which preceded it, for at least it offered protection. It encouraged a certain amount of trade and commerce, because the feudal lord had many wants, and he was usually willing to protect the merchant who supplied them.

The Crusades and Commerce.—The Crusades, or wars by which the Christians sought to recover the Holy Land from the Turk, resulted in a trade between Europe and India that grew to wonderful proportions. Silk fabrics, cotton cloth, precious stones, ostrich plumes, ivory, spices, and drugs—all of which were practically unknown in Europe—were eagerly sought by the nobility and their dependencies. In return, linen and woollen fabrics, leather goods, glassware, blacklead, and steel implements were carried to the far East.

Milan, Florence, Venice and Genoa, Constantinople and a number of less important towns along the Mediterranean basin became important trade centres, but Venice and Genoa grew to be world powers in commerce. Not only were they great receiving and distributing depots of trade, but they were great manufacturing centres as well.

The routes over which this enormous commerce was carried were few in number. For the greater part, the Venetian trade went to Alexandria, and thence by the Red Sea to India. Genoese merchants sent their goods to Constantinople and Trebizond, thence down the Tigris River to the Persian Gulf and to India. There was also another route that had been used by the Phœnicians. It extended from Tyre through Damascus and Palmyra[2] to the head of the Persian Gulf; this gradually fell into disuse after the founding of Alexandria.

The general effects of this trade were very far-reaching. To the greater number of the people of Europe, the countries of India, China, and Japan were mythical. According to tradition they were infested with dragons and gryphons, and peopled by dog-headed folk or by one-eyed Arimaspians. About the first real information of them to be spread over Europe was brought by Marco Polo, whose father and uncle had travelled all through these countries during the latter part of the thirteenth century.[3] Marco Polo's writings were very widely read, and influenced a great many people who could not be reached through the ordinary channels of commerce. So between the wars of the Crusades on the one hand, and the growth of commerce on the other, a new and a better civilization began to spread over Europe.

The Turkish Invasions.—But the magnificent trade that had thus grown up was checked for a time by an unforeseen factor. The half-savage Turkomans living southeast of Russia had become converted to the religion of Islam, and in their zeal for the new belief, determined to destroy the commerce which seemed to be connected with Christianity. So they moved in upon the borderland between Europe and Asia, and one after another the trade routes were tightly closed. Then they captured Constantinople, and the routes between Genoa and the Orient were hermetically sealed. Moslem power also spread over Syria and Egypt, and so, little by little, the trade of Venice was throttled.

ROUTES TO INDIA—THE TURK CHANGES THE COMMERCE OF THE WORLD

Now a commerce that involved not only many millions of dollars, but the employment of thousands of people as well, is not likely to be given up without a struggle. So the energy that had been devoted to this great trade was turned in a new direction, and there began a search for a new route to India—one that the Turks could not blockade.

The Search for an All-Water Route to India.—Overland routes were out of the question; there were none that could be made available, and so the search was made for a sea-route. Rather singularly the Venetians and Genoese, who had hitherto controlled this trade, took no part in the search; it was conducted by the Spanish and the Portuguese.

The Spanish monarchs, Ferdinand and Isabella of Castile, fitted out an expedition under Christopher Columbus, a master-mariner and cartographer, the funds being provided by Isabella, who pledged her private property as security for the cost of the expedition. This expedition resulted in the discovery, October 10–21, 1492, of the West India Islands. In a subsequent voyage, Columbus discovered the mainland of South America.

Even before the voyage of Columbus, the Portuguese had been trying to find a way around Africa to India, and Pope Eugenius IV. had conferred on Portugal