Background of the Theory of Three Stages of the Migration Process
The evolution of views on the migration of the population as a single whole, representing not only the territorial movement, but also including the necessary actions and actions preceding this resettlement and its completion is cosidered. The emergence of these views, transformed into a theory of the three stages of the migration process, refers to the last decades of the nineteenth century. They were voiced almost simultaneously in the UK and in Russia. The revival of the theory of the three stages of the migration process under Soviet conditions dates back to the 60s of the 20th century. At first, the development of migration thought went on its own in three directions. The study of migration flows, their geography, structure, and methods of measurement was carried out most extensively. The next direction in the study of population migration is associated with the rapid development in those years of sociological theory, which found its refraction in the migration sphere, which allowed the creation of a theory of migratory behavior at the junction of the 1960s and 1970s. The third direction of the formation of the theory of the three stages of the migration process was research on the survival of new settlers in places of introduction and the associated creation there of a permanent population. The combination of research results in these three areas made it possible to formulate the main theses of the theory of the three stages of the migration process. The article shows that the migration process consists of three parts, one of which precedes the act of resettlement, the second represents the actual migration of the population and the third occurs immediately after the completion of the act of resettlement in places where migrants migrate. Mobility, migration itself, as well as adaptation, are all consistently linked stages of a single process. The contribution of Russian scientists to the creation of this theory and the differences that are encountered in contemporary literature in the interpretation of individual stages of the migration process are shown in the work.