The purpose of theater, like magic, like religion . . . is to inspire cleansing awe . What makes good drama? And why does drama matter in an age that is awash in information and entertainment? David Mamet, one of our greatest living playwrights, tackles these questions with bracing directness and aphoristic authority. He believes that the tendency to dramatize is essential to human nature, that we create drama out of everything from today's weather...