I have attempted to show, in foregoing essays,[44] what an immense rôle is played by monopoly throughout the whole social life of mankind in all its stages. There would not be any struggle for existence if it were not true that the supply in nature of the things necessary for human existence is niggardly. The struggle for existence consists in a contest against the constraints by which human life is surrounded; the process by which men have won something in that contest, in the course of time, has consisted in playing off one of nature’s monopolies against another--the process, namely, which we call “employing natural agents.” On its social and political side, the advance has consisted in securing for the individual a chance in some degree to control his own destiny; not to be at the sport of natural and social forces, but to bring his own energy to bear to enlarge his own conditions of enjoyment and survival. At every stage of history, however, the natural monopolies have formed the basis of social and political monopolies. The possession of those powers which, under the circumstances, were most efficient for the acquisition of what men want has always given superiority and dominion in human society, whether those powers were physical force, beauty, learning, virtue, capital, or anything else. Where does any one find ground to believe that the fact will ever be different, and that those who have the powers which are most potent in the society in which they live will use those powers, not to get the things which all men want for themselves, but to get those same things for other people? The fashion has always been in the past for those who possessed the essential powers to take control of the state and realize their monopoly in that way. If plutocracy should now prevail it would be simply a repetition of that experience. The only device which has ever given promise of wider and more humane organization of the state is constitutional liberty, which compels, by the intervention of institutions created to serve this purpose, the ruling class, whoever they were, to respect the recognized and defined rights of all the rest. Now, democracy having sapped and dissolved all the inherited forms of social organization and reduced the social body to atoms, it is most interesting to observe the inevitable recurrence of all the old tendencies, in new forms fitted to the times. Some of us thought that liberty was won forever, and that the race was nevermore to be disturbed by its old problems, but it is already apparent that, when a society is resolved into its constituent atoms, the question under what forces, and upon what nuclei, it will crystallize into new forms, has acquired an importance never known before.