Perhaps the central question of psychology involves how personality—personhood—is formed. The twin factors or causes, of nature (genetics) versus nurture (environment), always lurk and subtly interplant in an epigenetic synthesis. This book, for professions as well as for general readers, identifies and consolidates an understanding of personality development, personality type, and personality style. Twelve Styles are identified and displayed through case examples. Examined is the powerful organizing principle of how emotion, especially anger, is managed. A detailed glossary helps guide the reader.