In the audiobook, the outstanding Russian psychiatrist, psychologist and physiologist Vladimir Mikhailovich Bekhterev reveals the essence of the mental phenomenon of suggestion. The author dwells in detail on the mechanisms of the emergence of various types of mental epidemics, such as mass illusions and hallucinations, mass hysteria and mass panic, explains the behavior of possessed and sorcerers, sectarians and religious fanatics. According to the scientist, suggestion is the social factor that plays an important role in the life and history of entire peoples.