A string of demanding jobs, military service, and tough business lessons taught Sam Walton resilience, entrepreneurship, and how to attract the most customers. His single-mindedness supercharged a small shop in Arkansas growing into the biggest company in the world. But it wasn’t smooth sailing. Along the way, allegations of predatory business practices, bribing governments, and labor disputes have threatened to put a stop to a retail juggernaut. This is the story of Walmart.