The importance of migration has been constantly increasing in the postwar period. Apparently, this phenomenon would not require special measures on social security at national level. Reality has shown, however, that existing regulations must continuously improve and adapted to the evolution of migration, so their application to be more effective. In the European Union labor migration policy has not only stimulated a high level of employment, but also improved and modernized existing social security systems and created a community to ensure social protection of migrant workers. The effect of labor migration in Europe is very complex related of both economic and demographic aspects. And for new and future state members , which will be the main providers of employment migrant Square in the European Union in the coming years, migration has multiple effects: economico-financial, social and occupational, cultural and political. For this reason, the acceptance of workers arriving from new Member States, as a means to support economic growth and social security systems and pension schemes, will be special blending areas for the European Union in the coming years. Free movement of persons, particularly workers, have, therefore, benefits both for the core countries of the European Union - primarily destination for migrant workers - and for new and future member states. Free movement of persons is probably the most important right of the individual within the legislation and an essential element both for domestic and European citizenship. Therefore, it is very important that the candidate countries and their citizens should know all the consequences of this freedom and prepare for accession. Evolution of migration in Europe Migration has existed since the beginnings of mankind. The phenomenon has not stopped in time, but made changes and developed new forms. Migration processes are carried out simultaneously and are increasing in many countries. One of the long-term results of these evolutions would be the appearance of multicultural societies, tending towards new concepts of citizenship or national state. Most developed countries have become diversified societies, multi-ethnic, and those who have not reached this level yet, turned decisively in this direction. An important feature of the population is moving from one place to another. The right to move was recognized globally for over half a century, by the Universal Declaration of Human Rights. Statement stipulates in Article 13: "Everyone has the right to move freely and to reside on the territory of any State "and" Everyone has the right to leave one country, including the origin, and to return to his country.” After the end of World War II, European countries have experienced four major periods of migration: a) Labor migration and the reconstruction of Europe: period from 1950-1960 Immediately after World War II, national ethnics and other persons who travled, began to return to their countries of origin, resulting in mass migration flows in Europe. At the same time, the postwar reconstruction of Europe requires a large amount of labor. As a result, the authorities of interested states, firms or private agencies have begun to recruit foreign workers.
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