This book follows L. Ron Hubbard's earlier title Dianetics . It covers additional developments in the field of Dianetics. 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. Knowing only one or two characteristics of a person and using this chart, you can plot his or her position on the Tone Scale (which is decribed in detail in the book) 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. And therein lies the basis of today's Grade Chart.