The textbook is devoted to the study of the problem of bullying and mobbing in schools and labor collectives. The questions of socialization of personality and dynamics of development of a small group, the participant of which becomes a person, are considered in detail. The reasons for the emergence of bullying and mobbing are considered and the psychological program for the prevention of bullying and mobbing in schools and work teams is given.The textbook is prepared by Professor Nikolai Simonovich Nikolai Evgenyevich Simonovich, Doctor of Psychological Sciences, Professor of the Department of Social Psychology, L.S. Vygotsky Institute, Russian State University of Humanities.