History furnishes us with innumerable instances that prove this law. It shows, with a startling clarity, that whenever Aryans have mingled their blood with that of an inferior race the result has been the downfall of the people who were the standard-bearers of a higher culture. In North America, where the population is prevalently Teutonic, and where those elements intermingled with the inferior race only to a very small degree, we have a quality of mankind and a civilization which are different from those of Central and South America. In these latter countries the immigrants--who mainly belonged to the Latin races--mated with the aborigines, sometimes to a very large extent indeed. In this case we have a clear and decisive example of the effect produced by the mixture of races. But in North America the Teutonic element, which has