Science of survival - L. Ron Hubbard

The most useful book you will ever own. Built around the Hubbard Chart of Human Evaluation, Science of Survival provides the first accurate prediction of human behavior. Included on the chart are all the manifestations of an individual's survival potential graduated from highest to lowest, making this the complete book on the Tone Scale. Knowing only one or two characteristics of a person and using this chart, you can plot his or her position on the Tone Scale and thereby know the rest, obtaining an accurate index of their entire personality, conduct and character.

Before this book the world was convinced that cases could not improve but only deteriorate. Science of Survival presents the idea of different states of case and the brand-new idea that one can progress upward on the Tone Scale.