With hunger at its root, appetite has been the driving force for human culture, especially when it comes to food. Appetite fuels ambition. Appetite drives our economy. Appetite is life. But our appetites have their consequences, especially when unchecked. Hunger and obesity, consumption and conservation, ambition and suppression, control and freedom—these are a few of the paradoxes of appetite that present challenges to our modern society. This year we are using appetite as a tool to help us understand how to arrive at a more healthful, sustainable future.