1.2 billion people on Earth still don't have electricity. Even where cell phones are now common, like sub-Saharan Africa and parts of India, villagers still walk miles to charge them. But new large-scale, sustainable solutions will not only usher in a new era of light, but be an important first step in lifting people from poverty and putting them on a road of sustainable economic development. Also, a unique, transforming opportunity for Western thinkers and practitioners will be created. These areas have largely skipped the analog stage of power development, and have moved straight from...