Chris Arnade earned a PhD in physics, then made millions on Wall Street as a trader. He quit in 2012 to travel the U.S., photographing poor, neglected neighborhoods. He said he saw a lot more community and dignity there than people typically think, but also more frustration and inequality. Some choose to stay, he points out. “This idea that we should all leave, all get out, why is that our only measure of success? What about a child who stays to be with their family?”