Many companies and B schools still treat strategy and execution as separate beasts, despite increasing evidence that the divide does much more damage than good. A large part of the problem may be that people view strategic reasoning as a high-level executive function of the brain and tactical thought as a discrete, lower-level activity. But the two kinds of thinking are linked in an important way: They both draw considerably on social-emotional reasoning, particularly in the brains of the most adept strategic thinkers. Indeed, strategic thought entails at least as much emotional intelligence as it does IQ.

A version of this article appeared in the September 2010 issue of Harvard Business Review.