Sometimes the smartest strategy is recognizing the battlefield has already changed. In military planning there’s a term called O.B.E., which stands for “Overcome By Events.”* Imagine spending months planning and preparing to defend an airfield, only to discover the enemy has already advanced far beyond it before your forces even arrive. Your strategy may have been magnificent, detailed, and perfectly original. It’s also now irrelevant. The real world changed faster than the plan allowed for....