a share in, or a monopoly of, these lucrative lines of trade became a primary object of ambition to all the great states. In the nineteenth century Europe began to be unable to supply her own needs in regard to the products of the temperate zone, and therefore to desire control over other areas of this type; but until then it was mainly in regard to the tropical or sub-tropical areas that the commercial motive formed the predominant element in the imperial rivalries of the nation- states. And even to-day it is over these areas that their conflicts are most acute.
A third motive for imperial expansion, which must not be overlooked, is the zeal for propaganda: the eagerness of virile peoples to propagate the religious and political ideas which they have adopted. But this is only another way of saying that nations are impelled upon the imperial career by the desire to extend the influence of their conception of civilisation, their Kultur. In one form or another this motive has always been present. At first it took the form of religious zeal. The spirit of the Crusaders was inherited by the Portuguese and the Spaniards, whose whole history had been one long crusade against the Moors. When the Portuguese started upon the exploration of the African coast, they could scarcely have sustained to the end that long and arduous task if they had been allured by no other prospect than the distant hope of finding a new route to the East. They were buoyed up also by the desire to strike a blow for Christianity. They expected to find the mythical Christian empire of Prester John, and to join hands with him in overthrowing the infidel. When Columbus persuaded Queen Isabella of Castile to supply the means for his madcap adventure, it was by a double inducement that he won her assent: she was to gain access to the wealth of the Indies, but she was also to be the means of converting the heathen to a knowledge of Christianity; and this double motive continually recurs in the early history of the Spanish Empire. France could scarcely, perhaps, have persisted in maintaining her far from profitable settlements on the barren shores of the St. Lawrence if the missionary motive had not existed alongside of the motives of national pride and the desire for profits: her great work of exploration in the region of the Great Lakes and the Mississippi Valley was due quite as much to the zeal of the heroic missionaries of the Jesuit and other orders as to the enterprise of trappers and traders. In English colonisation, indeed, the missionary motive was never, until the nineteenth century, so strongly marked. But its place was taken by a parallel political motive. The belief that they were diffusing the free institutions in which they took so much pride certainly formed an element in the colonial activities of the English. It is both foolish and unscientific to disregard this element of propaganda in the imperialist movement, still more to treat the assertion of it by the colonising powers as mere hypocrisy. The motives of imperial expansion, as of other human activities, are mixed, and the loftier elements in them are not often predominant. But the loftier elements are always present. It is hypocrisy to pretend that they are alone or even chiefly operative. But it is cynicism wholly to deny their influence. And of the two sins cynicism is the worse, because by over-emphasising it strengthens and cultivates the lower among the mixed motives by which men are ruled.
The fourth of the governing motives of imperial expansion is the need of finding new homes for the surplus population of the colonising people. This was not in any country a very powerful motive until the nineteenth century, for over-population did not exist in any serious degree in any of the European states until that age. Many of the political writers in seventeenth-century England, indeed, regarded the whole movement of colonisation with alarm, because it seemed to be drawing off men who could not be spared. But if the population was nowhere excessive, there were in all countries certain classes for which emigration to new lands offered a desired opportunity. There were the men bitten with the spirit of adventure, to whom the work of the pioneer presented an irresistible attraction. Such men are always numerous in virile communities, and when in any society their numbers begin to diminish, its decay is at hand. The imperial activities of the modern age have more than anything else kept the breed alive in all European countries, and above all in Britain. To this type belonged the conquistadores of Spain, the Elizabethan seamen, the French explorers of North America, the daring Dutch navigators. Again, there were
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