Linguistic ignorance and racial isolation are our greatest national dangers in the new era opened out by the War. We can no longer stand apart from Europe if we would. Yet we are untrained to mix with our neighbours, or even talk to them. Foreign policy is merely an outcome of our other international relations, and can only give official expression to our national ignorance or our national understanding of other races. The League of Nations is not a substitute for mutual understanding; rather it assumes that such understanding exists, and if that cannot soon be brought into existence, the League will fail, and with it the hopes of mankind.