decline, their subjugation by less civilized races and the extinction of their tradition; thirdly, a revival of their numbers on a much lower plane of civilization, after generations of selection of those who have neither intelligence nor fore sight. If this result is to be avoided, the present unfortunate selectiveness of the birth-rate must be somehow stopped.
The problem is one which applies to the whole of Western civilization. There is no difficulty in discovering a theoretical solution, but there is great difficulty in persuading men to adopt a solution in practice, because the effects to be feared are not immediate and the subject is one upon which people are not in the habit of using their reason. If a rational solution is ever adopted, the cause will probably be international rivalry. It is obvious that if one State—say Germany—adopted a rational means of dealing with the matter, it would acquire an enormous advantage over other States unless they did likewise. After the war, it is possible that population questions will attract more attention than they did before, and it is likely that they will be studied from the point of view of international rivalry. This motive, unlike reason and humanity, is perhaps strong enough
