In the 60,000 years since people began colonising the continents, a recurring feature of human civilisation has been mobility the ever-constant search for resources and stability. The map of humanity isn't settled, not now, not ever. Here global strategy advisor Khanna provides an illuminating and authoritative vision of the next phase of human civilization - one that is both mobile and sustainable. A look at the powerful global forces that will cause billions of us to move geographically over the next decades.