The purpose of the review of foreign literature is to analyze the concepts of solidarity in psychology and related sciences with a focus on the role of media. Solidarity is considered as a complex socio-psychological construct, including positive identity, mindset for cooperation, empathy, an image of a positive future, a plan of joint actions, trained skills of social assistance, etc. The core of the construct is a group identity, through its valence (positive or negative), the vector of unity-separation of people is set. Solidarity is considered not only as a resource of group dynamics, but also of personal development. It can be positive ("for something"), and negative ("against someone"), depending on the valence of the identity that is formed or supported by the media. The role of media in the processes of solidarity of the population is not always realized and indicated by researchers. It is shown that in times of crisis, the mass media can provoke infodemia, increase anxiety, stress, inadequate search behavior in people, and stimulate negative solidarity. The psychological preconditions of infodemia are the need for control, attempts to maintain a positive identity, and group protection. Similar mechanisms work in the development of solidarity, the need for which is actualized, but not used by the media. The role of social networks in the consolidation of groups is underestimated: virtual weak and latent connections are strengthened and can be used to inform and conduct training in quarantine conditions. Official media’s tasks in times of natural disasters should include science-based education, the development and strengthening of solidarity attitudes in society in close contact with academic institutions.