Mumbai, the most populous city in India, is squeezed into a peninsula on the edge of the Arabian Sea. It’s a hot, muggy, cosmopolitan city, with a polluted always hazy skyline, crammed with high-rise buildings housing the middle class and the wealthy, some with views of the sweep of waterfront along the Arabian Sea. But it’s also riddled with enormous, heart wrenching inequality. Slums, where the working poor reside, contain up to 50% of the population of just over 20 million