It appeared completely unexpectedly and sparked a global movement. Because here Ron announces his discoveries about the reactive mind, which enslaves Man and is the fundamental explanation of his behavior. It is the cause of nightmares, unexplained fears, upsets, and insecurity. And here is the way to get rid of it and achieve the goal of Clear, a goal that man has sought for thousands of years. This is the complete manual that analyzes the process of Dianetics and with which two intelligent individuals can break the chains that keep them imprisoned in the upsets and traumas of the past. It has been a bestseller for more than half a century, tens of millions of copies have been printed, it has been translated into more than fifty languages, and it is used in more than 100 countries on Earth. Dianetics is undoubtedly the most widely read book about the human mind ever written. That is why it has gone down in history as Book One.