International migration has been steadily increasing in every region of the globe since the end of the Second World War. In 2017, approximately 258 million people reside outside of their country of birth (3.4 percent of the world’s population) and over the past half century, individual mobility has increased at a steady pace. Tens of millions of people cross borders on a daily basis, which adds up to roughly two billion annually. International mobility is part of a broader trend of globalization, which includes trade in goods and services, investments and capital flows, greater ease of travel, and a veritable explosion of information. While trade and capital flows are the twin pillars of globalization, migration is the third leg of the stool on which the global economy rests.