Millions of people on all continents have fled their homes. The social, economic and political factors behind these mass movements -- war and persecution, drought and hunger, joblessness and hopelessness, environmental devastation -- seem certain to continue in the years ahead, but pressure is growing in many countries to close doors to those fleeing. In this thoroughly researched volume, the author analyses current movements of people in their global and regional contexts and suggests how the international system might respond better to the needs of migrants and refugees. She concludes with a vision and plan of action for churches and non-governmental organisations.