Water power on non-navigable streams usually results from dropping a little water a long way. In the mountains water is dropped many hundreds of feet upon the turbines which move the dynamos that produce the electric current. Water power on navigable streams is usually produced by dropping immense volumes of water a short distance, as twenty feet, fifteen feet, or even less. Every stream is a unit from its source to its mouth, and the people have the same stake in the control of water power in one part of it as in another. Under the Constitution, the United States exercises direct control over navigable streams. It exercises control over non-navigable and source streams only through its ownership of the lands through which they pass, as the public domain and National Forests. It is just as essential for the public welfare that the people should retain and exercise control of water-power monopoly on navigable as on non-navigable streams. If the difficulties are greater, then the danger that the water powers may pass out of the people's hands on the lower navigable parts of the streams is greater than on the upper non-navigable parts, and it may be harder, but in no way less necessary, to prevent it. It must be clear to any man who has followed the development of the Conservation idea that no other policy now before the American people is so thoroughly democratic in its essence and in its tendencies as the Conservation policy. It asserts that the people have the right and the duty, and that it is their duty no less than their right, to protect themselves against the uncontrolled monopoly of the natural resources which yield the necessaries of life. We are beginning to realize that the Conservation question is a question of right and wrong, as any question must be which may involve the differences between prosperity and poverty, health and sickness, ignorance and education, well-being and misery, to hundreds of thousands of families. Seen from the point of view of human welfare and human progress, questions which begin as purely economic often end as moral issues. Conservation is a moral issue because it involves the rights and the duties of our people--their rights to prosperity and happiness, and their duties to themselves, to their descendants, and to the whole future progress and welfare of this Nation. CHAPTER VIII PUBLIC SPIRIT