The social consequences of pseudoscience are particularly devastating. Let us formulate the most important of them. For example, the baldness for many years made it impossible to discuss the feedback from the environment in the analysis of the origin and evolution of life. But in nature, processes are impossible without such feedback. The most important, purely scientific problem of search of extraterrestrial civilizations is discredited by fans of "flying saucers", UFOs and women who have become pregnant, ostensibly, from aliens. The same is true in everyday life when it is necessary to have a doctor intervene, but people turn to pseudo-scientific healers and die. Another class of examples of the social consequences of pseudoscience is related to social processes. Scientific works of the middle of XIX century became the basis of narrow specializations of modern sciences. But their concrete results have been repeatedly specified for this time. In the social sciences, for political