I remember exactly where I was. Twenty years ago, I was working in Hollywood. On my lunch break, I was at Philly’s Pizza on La Cienega and Olympic, reading The 33 Strategies of War by Robert Greene. In a chapter about the “divide-and-conquer” strategy, Robert writes about the Athenians’ legendary stand against a massive Persian invasion on the plains of Marathon in 490 B.C. After the battle in Marathon, the soldiers had to immediately race back to Athens where a second Persian fleet...