Prof. Shannon observes that the spirit of society and the attitude of our government has been to protect our forests, inspect our swine and neglect our children, but that a wiser and more hopeful day is dawning. More interest in the study and application of the laws of Heredity has been taken in the past ten years than in the previous ninety. Newspapers and magazines contain articles by leaders of eugenic thought; purity organizations are springing up throughout the country and sounding the word of warning against the prevailing ignorance of these subjects; books are being written; sermons and lectures delivered and the masses are becoming interested. In this Prof. Shannon is doing his part. The sale of his books to date have reached in excess of a quarter of a million copies with no organized effort behind them. Each copy sold seems to sell two others, and with the business growing by leaps and bounds and getting beyond his control, the present publishers with a sales system unexcelled, were selected as a medium for placing his messages literally into the homes of millions. Prof. Shannon is a member of the Advisory Board of the World’s Purity Federation and lectures under the auspices of this movement. Eight years as teacher of Biology, after his graduation from college, his experience in writing eight other purity books and years of research and lecturing on these subjects have eminently qualified him for the high position he holds to-day with the World’s Purity Federation, and as author of a number of books on moral, social and reform topics which are to-day meeting with such an enormous sale. He sends forth this volume on its mission of usefulness to the human race with the implicit faith that it will be the means of safeguarding the youth wherever it goes and make thousands of homes happier and brighter and the world a better place to live. THE PUBLISHERS. INTRODUCTION The saddest thing in all this world is a human wreck,--a man or a woman, young or old, who is undone and who, in one or more walks of life, is a failure. There are so many of them! Mental wrecks, physical wrecks, nervous wrecks, social wrecks, business wrecks, character wrecks. The aspect of these derelicts is the more pitiable because of the possibilities before every well-born human being, who, with the endowment of intelligence and other gifts and powers bestowed upon him by a kind Creator, is capable of rising to heights of human perfection. Ample provision made for man’s every need and want by God, and yet we find misery where there ought to be happiness, poverty where there ought to be riches, darkness where there ought to be light, ignorance where there ought to be knowledge, vice where there ought to be virtue, and turmoil and strife where there ought to be peace. Only too accurately do the poet’s words apply: “Of all the sad words of tongue or pen, The saddest are these: ‘It might have been.’”