How do our thoughts influence our behavior? How do body and mind work together? Do we have free will? The book "Psychology" explores and explains the major ideas and groundbreaking theories of psychology in a clear and simple way, making it the perfect introduction to the subject. It untangles complex theories and illuminates abstract concepts by breaking down each intricate idea with easily understandable explanations and engaging images. In this book, you will find the history of psychology, from its roots in philosophy to modern studies on autism and psychiatry across all major research fields, from psychotherapy to cognitive psychology to behaviorism. Groundbreaking ideas from great thinkers, including Sigmund Freud, Carl Jung, Noam Chomsky, and Daniel Kahneman. Information about the key figures of the 19th and 20th centuries whose work has significantly contributed to our understanding of human behavior. With millions of copies sold worldwide, "Psychology" is part of DK's award-winning Big Ideas series. The series uses images, tables, fact sheets, and engaging writing to make big topics easily understandable. Other titles include "Biology," "Medicine," and "Science.".