What was the problem confronting the merchant adventurer of the sixteenth century? There were newly-discovered foreign lands containing, as he believed, precious metals and stones and spices, and inhabited by savages or semi-savages. If other traders got those stones, it was quite evident that he could not. His colonial policy, therefore, had to be directed to two ends: first, such effective political occupation of the country that he could keep the savage or semi-savage population in check, and could exploit the territory for its wealth; and, secondly, such arrangements as would prevent other nations from searching for this wealth in precious metals, spices, etc., since, if they obtained it, he could not.
That is the story of the French and Dutch in India, and of the Spanish in South America. But as soon as there grew up in those countries an organized community living in the country itself, the whole problem changed. The Colonies, in this later stage of development, have a value to the Mother Country mainly as a market and a source of food and raw material, and if their value in those respects is to be developed to the full, they inevitably become self-governing communities in greater or less degree, and the Mother Country exploits them exactly as she exploits any other community with which she may be trading. Germany might acquire Canada, but it could no longer be a question of her taking Canada's wealth in precious metals, or in any other form, to the exclusion of other nations. Could Germany "own" Canada, she would have to "own" it in the same way that Britain does; the Germans would have to pay for every sack of wheat and every pound of beef that they might buy, just as though Canada "belonged" to England or to anybody else. Germany could not have even the meagre satisfaction of Germanizing these great communities, for one knows that they are far too firmly "set." Their language, law, morals, would have to be, after German conquest, what they are now. Germany would find that the German Canada was pretty much the Canada that it is now--a country where Germans are free to go and do go; a field for Germany's expanding population.
As a matter of fact, Germany feeds her expanding population from territories like Canada and the United States and South America without sending its citizens there. The era of emigration from Germany has stopped, because the compound steam-engine has rendered emigration largely unnecessary. And it is the developments which are the necessary outcome of such forces, that have made the whole colonial problem of the twentieth century radically different from that of the eighteenth or seventeenth.