The paper discusses the reasons why conspiracy theories emerge (the desire to belong, survive, be close with the members of the group, and maintain a positive image of ourselves and the community). Theories and results of research about psychological factors that are believed to influence the emergence of conspiracy theories are presented. The authors conclude that belief in conspiracy theories is highly dependent on epistemological, existential, and social motives. Research has not yet shown that these theories serve to satisfy these motives, and it is even possible to the contrary, that these theories do not strengthen social cohesion at all, do not lead to improvement of self-esteem and a more positive image of ourselves or the group we belong to. Important questions remain open and more research needs to be done about the consequences of believing in conspiracy theories, especially in vulnerable populations, which have been found to have the highest motivation to accept these theories. The tendency to believe in conspiracy theories is a phenomenon influenced by many factors. Some of these factors are belonging to a lower socio-economic background, a lower educational level, a tendency to outsource one's own responsibility for life's failures, or to neglect the genetic and educational factors that led to it. However, many other factors, such as mental health status, also determine this phenomenon. Poorly integrated, deeply insecure personalities who have not overcome the schizoid-paranoid position of development, tend to perceive the environment as perceptual and threatening, with the aim to protect their own self from deeper disintegration. [ABSTRACT FROM AUTHOR]