Once upon a time, political beliefs were loosely linked to class and status. But they increasingly define our entire cultural identities, and vice versa. Now, as University of Maryland political scientist James G. Gimpel has argued, you can easily guess a person's political persuasion if you know the snack foods he eats or the music she downloads. (Talk about profiling! But if there were ever a reason to swear off kale chips, perhaps this is it.) It's depressing to think that millions and millions of unique individuals spread across millions of square miles and tracing their backgrounds from all corners of the globe can be so easily reduced to just two rather narrow camps.