This is the more evident when we examine recent changes of detail in this general situation special to England. Before the War a very large proportion of our food and raw material was supplied by the United States. But our economic relationship with that country has been changed as the result of the War. Previous to 1914 we were the creditor and America the debtor nation. She was obliged to transmit to us large sums in interest on investments of British capital. These annual payments were in fact made in the form of food and raw materials, for which, in a national sense, we did not have to give goods or services in return. We are now less in the position of creditor, more in that of debtor. America does not have to transmit to us. Whereas, originally, we did an immense proportion of America's carrying trade, because she had no ocean-going mercantile marine, she has begun to do her own carrying. Further, the pressure of her population upon her food resources is rapidly growing. The law diminishing returns is in some instances beginning to apply to the production of food, which in the past has been plentiful without fertilisers and under a very wasteful and simple system. And in America, as elsewhere, the standard of consumption, owing to a great increase of the wage standard, has grown, while the standard of production has not always correspondingly increased. The practical effect of this is to throw England into greater dependence upon certain new sources of food--or trade, which in the end is the same thing. The position becomes clearer if we reflect that our dependence becomes more acute with every increase of our population. Our children now at school may be faced by the problem of finding food for a population of sixty or seventy millions on these islands. A high agricultural productivity on the part of countries like Russia and Siberia and the Balkans might well be then a life and death matter.