The Wal-Mart Effect: The overwhelming impact of the world's largest company-due to its relentless pursuit of low prices-on retailers and manufacturers, wages and jobs, the culture of shopping, the shape of our communities, and the environment; a global force of unprecedented nature. Wal-Mart is not only the world's largest company; it is also the largest company in the history of the world. Americans spend $26 million every hour at Wal-Mart, twenty-four hours of every day, every day of the year. Is the company a good thing or a bad thing? On the one hand, market guru Warren Buffett estimates that the company's low prices save American consumers $10 billion a year. On the other, the behemoth is the number-one employer in thirty-seven of the fifty states yet has never let a union in the door.