In 1967, just outside of Pittsburgh, a third-tier McDonald’s franchisee named Jim Delligatti broke the rules and invented a new sandwich. Within a year, the Big Mac was on the menu of McDonald’s restaurants around the world. (They even serve a meatless version in India.) Jim wasn’t focused on managing his franchise at the expense of everything else. Instead, he became a leader. Not blessed with a title or official sanction, Jim led the entire corporation in a new direction. In 1946, Percy Spencer, a low-ranking engineer at the Raytheon Corporation, was trying to improve radar technology when
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