writes Henry Stapp. Stapp is a leading quantum physicist who has given particularly careful thought to the implications of the theory that lies at the heart of modern physics. His book aims to provide serious science-based answers, useful both to ordinary people as well as to psychologists, neuroscientists, physicists, and philosophers, to the questions of how a person's conscious thoughts affect his or her physical actions in a way that the science of earlier centuries forbade, and what will be, or may be, the societal impact of an appreciation of this revised understanding of the nature of human beings. This new edition has been updated and extended to address recent debates about consciousness.