The world is not as mobile or as interconnected as we like to think. As Harm de Blij argues in The Power of Place, in crucial ways--from the uneven distribution of natural resources to the unequal availability of opportunity--geography continues to hold billions of people in its grip. We are all born into natural and cultural environments that shape what we become, individually and collectively. From our "mother tongue" to our father's faith, from medical risks to natural hazards, where we start our journey has much to do with our destiny. Hundreds of millions of farmers in the river basins...