Several years ago I spent a summer working in a crowded office in Delhi, India. Outside of the city’s rich enclaves, the electric system was overtaxed and unpredictable, and intermittently throughout the day our building would go dark. As our air-conditioning unit came grinding to a halt, my Indian co-workers would stop whatever they were doing and sink to the floor, surrendering to the awesome heat that rapidly engulfed the office. When power was restored — sometimes minutes, sometimes hours later — they’d slowly rise to their feet, rubbing their eyes.