According to Alfred Adler, one of the founding fathers of modern psychoanalysis alongside Freud and Jung, an individual’s level of social interest is key to his or her success in solving the problems of life, from forming meaningful relationships to achieving promotion in the workplace. Withstanding the test of time, this practical psychology continues to inform our way of life, influencing such areas as education, psychotherapy and healthcare. This is the first new translation of Social Interest since its original English publication in 1938, offering a completely updated and revised version of one of psychology’s seminal texts.