Since the underlying psychology is wrong, the problem and its solution assumes in fact a radically different form. There are an indefinite number of original or instinctive activities, which are organized into interests and dispositions according to the situations to which they respond. To increase the creative phase and the humane quality of these activities is an affair of modifying the social conditions which stimulate, select, intensify, weaken and coordinate native activities. The first step in dealing with it is to increase our detailed scientific knowledge. We need to know exactly the selective and directive force of each social situation; exactly how each tendency is promoted and retarded. Command of the physical environment on a large and deliberate scale did not begin until belief in gross forces and entities was abandoned. Control of physical energies is due to inquiry which establishes specific correlations between minute elements. It will not be otherwise with social control and adjustment. Having the knowledge we may set hopefully at work upon a course of social invention and experimental engineering. A study of the educative effect, the influence upon habit, of each definite form of human intercourse, is prerequisite to effective reform. VI In spite of what has been said, it will be asserted that there are definite, independent, original instincts which manifest themselves in specific acts in a one-to-one correspondence. Fear, it will be said, is a reality, and so is anger, and rivalry, and love of mastery of others, and self-abasement, maternal love, sexual desire, gregariousness and envy, and each has its own appropriate deed as a result. Of course they are realities. So are suction, rusting of metals, thunder and lightning and lighter-than-air flying machines. But science and invention did not get on as long as men indulged in the notion of special forces to account for such phenomena. Men tried that road, and it only led them into learned ignorance. They spoke of nature's abhorrence of a vacuum; of a force of combustion; of intrinsic nisus toward this and that; of heaviness and levity as forces. It turned out that these "forces" were only the phenomena over again, translated from a specific and concrete form (in which they were at least actual) into a generalized form in which they were verbal. They converted a problem into a solution which afforded a simulated satisfaction.