According to the United Nations Development Program (UNDP), migration is a way of counterbalancing the decline or stagnation of population growth, with serious economic consequences.
If a zero-migration scenario were to be adopted, in developed countries, by 2025, only New Zealand and Ireland would still have an increase in the working-age population.< /div>
The work, structured in 6 chapters, presents the evolution of population migration from ancient times to the present day.
