Wal-Mart is not just the world's largest company--it is the largest company in the history of the world. It is estimated that the company's low prices save American consumers $10 billion a year--but the #1 employer in 37 states has never let a union in the door. Though 70% of Americans now live within a 15-minute drive of a Wal-Mart, we have not even begun to understand the true power of the company. We know about the lawsuits and the labour protests,...