Poornima and Savitha have three strikes against them. They are poor. They are driven. And they are girls. When Poornima was just a toddler, she was about to fall into a river. Her mother, beside herself, screamed at her father to grab her. But he hesitated: "I was standing there, and I was thinking--she's just a girl. Let her go. That's the thing with girls, isn't it. You think, Push. That's all it would take, Just one little push." After her mother's...