International migration is one of the most pervasive social phenomena of our times. According to recent UN estimates, as of 2017, there were almost 260 million migrants around the world. In the last five decades, the number of foreign born individuals living in the United States has increased more than five-fold, moving from 9 million in 1970 to 50 million in 2017. Not surprisingly, these trends have sparked a heated political debate. Both in Europe and in the US, proposals to introduce or tighten immigration restrictions are becoming increasingly common, and support for populist, right wing parties has been rising steadily.
Read more: What America’s history of mass migration can teach us about attitudes to immigrants