"Our view was always, 'Let's just run a business.'" Today, former Walmart CEO Bill Simon would be in the minority. As more companies pick sides in the cultural debate, he -- like a lot of executives -- is having a hard time understanding which business these CEOs are in: advancing left-wing advocacy or their company's brand? Things have changed a lot over Bill Simon's career. In the retail business, he remembers, it used to be simple. "We'll sell to anybody. We'll try to stay out of the public eye on issues that can be confrontational." Fast-forward to today, when everything...