The definitive account of how a small Ozarks company upended the world of business and what that change means. Wal-Mart, the world's largest company, roared out of the rural South to change the way business is done. Deploying computer-age technology, Reagan-era politics, and Protestant evangelism, Sam Walton's firm became a byword for cheap goods and low-paid workers, famed for the ruthless efficiency of its global network of stores and factories....