In this book, Ian Goldin, Geoffrey Cameron and Meera Balarajan explore the critical role of human migration since humans first departed Africa some fifty thousand years ago. How the circulation of ideas and technologies has benefited communities and how the movement of people across oceans and continents has fueled economies. They show that migrants in today's world connect markets, fill labor gaps, and enrich social diversity. Migration also allows individuals to escape destitution, human rights abuses, and repressive regimes.