INTRODUCTION

Soon after I published a biography of my mentor Marvin Bower, the architect of McKinsey & Company, the phone rang at my home on a Friday night. “Hello.” The caller paused and then added, “This is Peter Drucker.” It took me a moment to grasp who it was on the other end of the phone, with his Viennese accent that sounded like my father’s. I walked out of the kitchen, away from my family, to clear my head and be alone with this strangely familiar voice.

Peter Drucker? The man credited with inventing the discipline of management? The man who wrote 39 books which have been translated into countless languages? The man who single-handedly counseled the chairmen of GM and Ford, who advised the president of the World Bank and the CEO of GE, ...

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