The usual narrative of America’s Dust Bowl years goes something like this: Midwestern farmers, driven by greed, recklessly and ignorantly wrecked the land to such a point that it became worthless. They essentially ate themselves to death. But Raj Patel, author of "The Value of Nothing," says it wasn’t some innate, every-man-for-himself style of greed that raped the land; it was the dominant capitalist construct that was to blame.