The book provides an overview of the evolution of psychology from Ancient Greece to the present day. The book explores the development of different schools of thought and areas of psychology, including psychophysics, behaviorism, cognitive psychology, social psychology, and clinical psychology. The authors highlight the interconnections between the various currents of psychological thought, showing how each one builds on, challenges, or transforms the previous ones. In addition, the book examines the influence of historical and social contexts, such as the First and Second World Wars, the Cold War period, and the anti-colonialist movement, on the development of psychology. Finally, the introduction presents some of the main themes that will be addressed in the book, such as nature versus nurture, the role of culture in the formation of identity, the biochemical and neurophysiological influences on behavior, the importance of cognition, and the search for a more comprehensive and inclusive approach to psychology.