The doctrine of evolution modified this idea of method only superficially. For “evolution” was itself often understood non-historically. That is, it was assumed that there is a predestined course of fixed stages through which social development must proceed. Under the influence of concepts borrowed from the physical science of the time, it was taken for granted that the very possibility of a social science stood or fell with the determination of fixed uniformities. Now every such logic is fatal to free experimental social inquiry. Investigation into empirical facts was undertaken, of course, but its results had to fit into certain ready-made and secondhand rubrics. When even physical facts and laws are perceived and used, social change takes place. The phenomena and laws are not altered, but invention based upon them modifies the human situation. For there is at once an effort to regulate their impact in life. The discovery of malaria does not alter its existential causation, intellectually viewed, but it does finally alter the facts from which the production of malaria arises, through draining and oiling swamps, etc., and by taking other measures of precaution. If the laws of economic cycles of expansion and depression were understood, means would at once be searched for to mitigate if not to do away with the swing. When men have an idea of how social agencies work and their consequences are wrought, they at once strive to secure consequences as far as desirable and to avert them if undesirable. These are facts of the most ordinary observation. But it is not often noted how fatal they are to the identification of social with physical uniformities. “Laws” of social life, when it is genuinely human, are like laws of engineering. If you want certain results, certain means must be found and employed. The key to the situation is a clear conception of consequences wanted, and of the technique for reaching them, together with, of course, the state of desires and aversions which causes some consequences to be wanted rather than others. All of these things are functions of the prevalent culture of the period.
While the backwardness of social knowledge and art is of course connected with retarded knowledge of human nature, or psychology, it is also absurd to suppose that an adequate psychological science would flower in a control of human activities similar to the control which physical science has procured of physical energies. For increased knowledge of human nature would directly and in unpredictable ways modify the workings of human nature, and lead to the need of new methods of regulation, and so on without end. It is a matter of analysis rather than of prophecy to say that the primary and chief effect of a better psychology would be found in education. The growth and diseases of grains and hogs are now recognized as proper subjects of governmental subsidy and attention. Instrumental agencies for a similar investigation of the conditions which make for the physical and moral hygiene of the young are in a state of infancy. We spend large sums of money for school buildings and their physical equipment. But systematic expenditure of public funds for scientific inquiry into the conditions which affect the mental and moral development of children is just beginning, and demands for a large increase in this direction are looked upon askance.
Again, it is reported that there are more beds in hospitals and asylums for cases of mental disturbance and retardation than for all diseases combined. The public pays generously to take care of the results of bad conditions. But there is no comparable attention and willingness to expend funds to investigate the causes of these troubles. The reason for these anomalies is evident enough. There is no conviction that the sciences of human nature are far enough advanced to make public support of such activities worth while. A marked development of psychology and kindred subjects would change this situation. And we have been speaking only of antecedent conditions of education. To complete the picture we have to realize the difference which would be made in the methods of parents and teachers were there an adequate and generally shared knowledge of human nature.
But such an educational development, though intrinsically precious to the last degree, would not entail a control of human energies comparable to
