It is becoming increasingly evident that the existence together, in a diminishing world, of rich nations and very poor nations, is the critical problem of our time; and indeed other questions of international relations are rapidly taking on the appearance of being merely aspects of this central crux. According to some authorities it may only be a matter of a few years before the food and population question takes on such alarming proportions as to make our present troubles on the international scene seem slight by comparison. It is only against this background that we can fully appreciate the...