The last remedy mentioned at the opening of this chapter was “deep breathing.” This is a later form of “physical culture” development, and is, in effect, a modification in the right direction. It is the logical outcome of the perception that strenuous, forcing, muscular exercises were resulting in new and possibly greater evils than those they professed to cure. “Deep breathing” is indeed a step in the right direction, but only a step, because, while it does not always do serious harm and in some instances, perhaps, a certain amount of good, it does not go to the root of the matter, the eradication of defects, nor does it take cognisance of the most important factor in the scheme of physical co-ordination. What that radical factor is I shall explain in detail in my next chapter, but I will first briefly review the chief points of the argument as far as it has been unfolded. In imagination we have seen man through the darkness which covers his first appearance on the earth, the early Miocene man. As we have pictured him, he was a creature of simple needs and of a vigorous bodily habit, an animal in all save that spark of self-consciousness which burned feebly in his primitive, but increasing and differentiating brain. Again we have a somewhat clearer vision of him with wider powers of courage and cunning, adapting weapons to his use, and so specialising the functions of his mind through a long two million years, through palæolithic and neolithic periods into the age of bronze, where he has become a reasoning, designing creature, with powers of imagination and idealisation, powers still turned, however, to physical uses. And at last we reach the differentiation of man from man and class from class which marks the historical period of civilisation, the period of dwelling in cities, of adaptability to new and specialised habits, of labour that makes little or no call upon the physical capacities, of food procured without energy, the period when the slow process of evolution, which has resulted in the product of a new and marvellous instrument of self-conscious, directive powers, was becoming gradually superseded by that which it had brought forth. III SUBCONSCIOUSNESS AND INHIBITION “You can have neither a greater nor a less dominion than that over yourself.”—LEONARDO DA VINCI.