"Water, water, everywhere, nor any drop to drink." Samuel Taylor Coleridge wrote those words over two centuries ago to describe abundance without access. Today, the crisis has acquired a far more unsettling meaning. Water may still be everywhere, but increasingly, it is not for everyone. In the twenty-first century, access to clean water is no longer determined solely by geography or rainfall. It is increasingly shaped by wealth, politics and power. The question is no longer
