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What it argues
The Extraordinary Leader is one of the more research-grounded leadership books of its era. Zenger and Folkman built their argument on a dataset of 360-degree feedback assessments covering more than 20,000 leaders, and their core finding is genuinely counterintuitive: fixing weaknesses makes a mediocre leader adequate, but it doesn't make an adequate leader great. What separates extraordinary leaders from good ones is the development of a small number of profound strengths — not the elimination of all deficiencies.
The book identifies sixteen competencies grouped into five clusters: character, personal capability, focusing on results, interpersonal skills, and leading organizational change. Extraordinary leaders don't excel at all sixteen. What they do consistently is score in the top quartile on a handful of competencies that are central to their role, while having no "fatal flaws" — severe weaknesses that actively undermine their effectiveness.
What it gets right
- 1.
The gap between good and great leadership is not about fixing weaknesses. It's about developing a small number of profound strengths that colleagues and direct reports find exceptional.
- 2.
Fatal flaws — severe deficiencies in areas like integrity, interpersonal skills, or basic competence — must be fixed because they actively undermine every other strength. But ordinary weaknesses don't require the same attention.
- 3.
Leadership effectiveness shows up in the data as a nonlinear curve: moving from the 50th to the 90th percentile in leadership quality produces dramatically better outcomes than moving from the 30th to the 50th.
What it covers
Who wrote it
John H. Zenger and Joseph Folkman are co-founders of Zenger Folkman, a leadership development consultancy that has conducted 360-degree assessments for tens of thousands of leaders globally. Zenger has been cited as one of the top management thinkers in the world by the Financial Times. Folkman is a behavioral statistician whose research underpins the firm's development models. Together they have co-authored several books on leadership effectiveness, including Strengths-Based Leadership and Speed: How Leaders Accelerate Successful Execution.
