International migration has changed over time and become a global phenomenon. There have historically been four periods of international migration: 1) the mercantile period from 1500-1800 which was dominated by European colonization, 2) the industrial period from 1800-1925 where over 48 million people migrated from Europe to places like the Americas, 3) a period of limited migration from the 1920s-1940s due to world wars and economic depression, and 4) a post-industrial period since the 1960s where migration has become truly global and sending countries have shifted from Europe to the developing world. India remains a major source of migrants worldwide while also receiving large remittances, and internal migration patterns in India include significant rural-urban and inter