Immigration security

The other kind of immigration

International migration can be divided into four types. The most important is the familiar one, from developing countries to developed ones. About 120m people alive today have made such a move, calculates the McKinsey Global Institute, an arm of the consultancy—from Mexican grape-pickers in California to Senegalese street vendors in France. But the second-largest flow is between developing countries (see chart). Between 2000 and 2015 Asia, including the Middle East, added more immigrants than Europe or North America.