With such an understanding of instincts in relation to human sexual actions, we cannot wonder that the old policy of mystery has failed so completely. Since human beings are left to control the most powerful appetite by intelligence, it is evident that a policy based on silence, ignorance, and mystery must fail. The only safe and sure road to the needed control of sexual actions is to be found in knowledge, and the widespread recognition of this fact has led to the new movement for general enlightenment regarding sexual processes in their various relations to human life. [Sidenote: Education as a solution of sex problems.] It is not surprising that we have turned to seek an educational solution for the problems of sex. Education has become the modern panacea for many of our ills--hygienic, industrial, political, and social. We have found people losing health for various reasons and we have proposed hygienic instruction as a prophylactic. We have analyzed many problems of the industries, and now we are beginning to seek their solution in industrial education. We have noted that numerous social and political misunderstandings check progress of individuals and nations, and we are coming to think the pathway upwards is to be found in better knowledge of social and political science. And, in like manner, in every phase of this modern life of ours we are looking to knowledge as the key to all significant problems. It is truly the age of education, not simply the education offered in schools and colleges, but education in the larger sense, including the learning of useful knowledge from all sources whatsoever. With such unbounded confidence in the all-sufficiency of education, it is most natural that we should turn to it in these times when we have come to realize the existence of amazing sexual problems caused either by ignorant misuse, or by deliberate abuse, of the sexual functions which biologically are intrusted with the perpetuation of human life and which psychologically are the source of human affection in its supreme forms. If education is to solve the civic, hygienic, and industrial problems of to-day and to-morrow, why should it not also help with the age-old sexual evils? So reasoning, we have naturally turned to education as one, but not the only, method of attack on the sexual problems which have degraded and devitalized human life of all past times, but which somehow have kept out of the limelight of publicity until our own times. Sec. 4. _The Scope of Sex-education_ [Sidenote: Sex-education is not primarily for schools.]