Chances are the strategies that worked well for you even a few years ago no longer deliver the results you need. Dramatic changes in business have unearthed a major gap between traditional approaches to strategy and the way the real world works now.

In short, strategy is stuck. Most leaders are using frameworks that were designed for a different era of business and based on a single dominant idea--that the purpose of strategy is to achieve a sustainable competitive advantage. Once the premise on which all...