This summer, I spent countless hours with America's first billionaire. Here's what I learned about business, life, and the deceptive power of simplicity from John D. Rockefeller.
My Summer with Rockefeller: 5 Lessons from…
This summer, I spent countless hours with America's first billionaire. Here's what I learned about business, life, and the deceptive power of simplicity from John D. Rockefeller.