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Dorothy's adventure, it turns out, is the perfect metaphor for a world of work where almost everyone's boss is either unintelligent, indecisive, or irascible. In other words, like most people, I've spent my career working with the Scarecrow, the Cowardly Lion, and the Tin Man. I started down this road in 1978 when I joined the Harvard Business School faculty. One of my first assignments was to teach MBA students about leadership. This seemed to me completely backward.