There are many causes at work here; and while this study seeks to show in various fields one cause, it does not claim that cause is the only one. Our economic conditions have enormous weight upon our amusements, as on all other human phenomena; but even under economic pressure the reactions of men and women are often dissimilar. Tired men and women both need amusement, the relaxation and restful change of irresponsible gayety. The great majority of women, who work longer hours than any other class, need it desperately and never get it. Amusement, entertainment, recreation, should be open to us all, enjoyed by all. This is a human need, and not a distinction of either sex. Like most human things it is not only largely monopolized by men, but masculized throughout. Many forms of amusement are for men only; more for men mostly; all are for men if they choose to go. The entrance of women upon the stage, and their increased attendance at theatres has somewhat modified the nature of the performance; even the "refined vaudeville" now begins to show the influence of women. It would be no great advantage to have this department of human life feminized; the improvement desired is to have it less masculized; to reduce the excessive influence of one, and to bring out those broad human interests and pleasures which men and women can equally participate in and enjoy. VII. ETHICS AND RELIGION. The laws of physics were at work before we were on earth, and continued to work on us long before we had intelligence enough to perceive, much less understand, them. Our proven knowledge of these processes constitutes "the science of physics"; but the laws were there before the science. Physics is the science of material relation, how things and natural forces work with and on one another. Ethics is the science of social relation, how persons and social forces work with and on one another. Ethics is to the human world what physics is to the material world; ignorance of ethics leaves us in the same helpless position in regard to one another that ignorance of physics left us in regard to earth, air, fire and water. To be sure, people lived and died and gradually improved, while yet ignorant of the physical sciences; they developed a rough "rule of thumb" method, as animals do, and used great forces without understanding them. But their lives were safer and their improvement more rapid as they learned more, and began to make servants of the forces which had been their masters. We have progressed, lamely enough, with terrible loss and suffering, from stark savagery to our present degree of civilization; we shall go on more safely and swiftly when we learn more of the science of ethics.