Dr. F. Bushee has pointed out ("Science and Social Progress," Popular Science Monthly, September, 1911) that there is a kind of related progression between science and practice in this matter: "The natural sciences developed first, because man was first interested in the conquest of nature, and the simpler physical laws could be grasped at an early period. This period brought an increase of wealth, but it was wasteful of human life. The desire to save life led the way to the study of biology. Knowledge of the physical environment and of life, however, did not prevent social disease from flourishing, and did not greatly improve the social condition of a large part of society. To overcome these defects the social sciences within recent years have been cultivated with great seriousness. Interest in the social sciences has had to wait for the enlarged sympathies and the sense of solidarity which has appeared with the growing interdependence of dense populations, and these conditions have been dependent upon the advance of the other sciences. With the cultivation of the social sciences, the chain of knowledge will be complete, at least so far as the needs which have already appeared are concerned. For each group of sciences will solve one or more of the great problems which man has encountered in the process of development.