This book explores the future of psychology in the twenty-first century, based on insights from some of the most influential psychologists of the twentieth and early twenty-first centuries. These experts, many of whom are now in their later years or have passed away, made significant contributions to both the science and practice of psychology, shaping the discipline into what it is today. The book gathers their predictions, ideas, and reflections on the future development of psychology. The psychologists featured come from diverse backgrounds, cultures, and linguistic contexts, and their collective work has enhanced our understanding of human behavior and improved quality of life. The book also acknowledges the absence of other notable figures who could not participate. Despite differing opinions, the contributors share common themes about the future direction of psychology, offering valuable perspectives on its next stages of evolution.