If we do so conclude, we shall be in error. It is the opposite that is nearer the truth. Both larger and stronger, and, on the whole, more easily educated muscles exist in the flexor than in the extensor system. The innumerable capacities of the half-closed hand are representative of this superiority. Still more important, however, is the fact that the flexor system is practically the dominant system in the human body. The hinges of the knee, hip, shoulder, elbow, wrist, and jaw are more often, more strongly, and more readily closed maximally than they are expanded to the full. Besides, occupational postures are almost universally crystallized withdrawing responses. Where, then, shall we look for the answer to our question? We shall look directly at the behavior of the organism as a whole. While it is admitted that flexor actions are stronger, more numerous, and more universal than are extensor reactions, yet when we consider how the flexor reactions dispose the body toward its environment, we shall at once have light on this curious problem. For the effect of such reactions is to cut off the body from a large part of the environment, and consequently to reduce the possibility of effective contact with it. Stooping, crouching, bowing the head, and lowering the eye are significant examples of flexor responses which reduce the span of perception, while every man knows that activities of the opposite character allow a greater number of stimuli to come in contact with his eyes and his ears. Consequently, even though flexor actions will always be in the majority, extensor actions have the advantage of providing the conditions under which a greater variety of stimuli can be presented to the organism. This is the same as saying that the open-minded person necessarily becomes discriminative and exploratory, while the opposite type is left to stew in his own juice. The flexor type of man is, indeed, in the end reduced to contacts with his own body, while to the extensor type of man his body is only one of the many sources of motivation, the rest being in the external environment. It seems thus to be primarily due to the very mechanics of the organism that the words “right” and “good” have a greater variety of significations than have the words “bad,” “evil,” and “wrong.”