Conspiracy theories are everywhere in post-war American culture. From postmodern novels to The X-Files and from gangsta rap to feminist polemic, there is a widespread suspicion that sinister forces are conspiring to take control of our national destiny, our minds, and even our bodies. Conspiracy explanations can no longer be dismissed as the paranoid delusions of far-right crackpots. Indeed, they have become a necessary response to a risky and increasingly...