A range of major forces are set to cause profound changes in natural and human environments across the world over the next 50 or so years. Besides climate change, examples include the growth of mega-cities, land degradation and the profound consequences of an increasing global population which is consuming ever more natural resources. The key aim of this Foresight project has been to consider how these global drivers could affect the volume and patterns of human migration out to 2030 and thence to 2060; and, importantly, the decisions that need to be taken today by policy makers at national and international levels to address the future challenges.