Positive Psychology focuses on promoting well-being, prosperity, and life satisfaction by studying the role of positive emotions, traits, motivations, and abilities of people. This book aims to introduce the basic concepts of Positive Psychology to the general public, professionals, scientists, and mental health students, such as psychological resilience, hope, and optimism, as well as methods for their evaluation. At the same time, it presents the theories and principles of Positive Psychology and, finally, its applications in work, education, and health promotion with the aim of improving and developing individuals, groups, and organizations. The Introduction to Positive Psychology serves as a first acquaintance with this new, promising branch of Psychology. It attempts to fill a gap regarding the developments and new trends in the field of Psychology and is considered an essential aid for those involved in the field of Psychology or interested in health promotion and individual or collective development and prosperity. [Excerpt from the text on the back cover of the edition]