These are the social aspects of birth control. There are also to be considered what I might call the personal aspects of it. Because young people do not know about it, and have no way to find out about it, they dare not marry, and so the amount of vice in the world is increased. Because married women do not know about it, love is turned to terror, and marital happiness is wrecked. Because the harmless and proper methods are not sensibly taught, people use harmful methods, which cause nervous disorders, and wreck marital happiness, and break up homes. Thorough and sound knowledge about birth control is just as essential to happiness in marriage as knowledge of diet is necessary to health, or as knowledge of economics is necessary to intelligent action as a voter and citizen. The suppression by law of knowledge of birth control is just as grave a crime against human life as ever was committed by religious bigotry in the blackest days of the Spanish Inquisition. Now this law stands on the statute books of our country, and if I should so much as hint to you in this book what you need to know, or even where you can find out about it, I should be liable to five years in jail and a fine of $5,000, and every person who mailed a copy of this book, or any advertisement of this book, would be in the same plight. But there is not yet a law to prohibit agitation against the law, so the first thing I say to every reader of this book is that they should obtain a copy of the _Birth Control Review_, published at 104 Fifth Avenue, New York, and also should join the Voluntary Parenthood League, 206 Broadway, New York. Get the literature of these organizations and circulate them and help spread the light! As to the knowledge which you need, the only advice I am allowed to give is that you should seek it. Seek it, and persist in seeking, until you find it. Ask everyone you know; and ask particularly among enlightened people, those who are willing to face the facts of human life and trust in reason and common sense. I do not know if I am violating the law in thus telling you how to find out about birth control. One of the charming features of this law, and others against the spreading of knowledge, is that they will never tell you in advance what you may say, but leave you to say it and take your chances! I believe that I am not violating any law when I tell you that there are half a dozen simple, inexpensive, and entirely harmless methods of preventing undesired parenthood without the destruction of the marital relationship.