CEO Aptitude: Are Leaders Really Born? Research Reveals

Are CEO aptitude personality traits something you are simply born with — or can they be developed over time? This is one of the most fascinating questions in leadership science, and a landmark large-scale study offers some surprisingly nuanced answers. Research drawing on data from approximately 1.3 million individuals suggests that while certain cognitive and personality traits do correlate with becoming a CEO, the picture is far more complex — and far more hopeful — than the “born leader” myth implies.

Many of us assume that CEOs must be extraordinary geniuses, set apart from birth by some rare combination of talent and charisma. But what if the science tells a different story? What if the traits that predict executive success are more common than we think — and what if innate ability is only a small piece of a much larger puzzle? Let’s explore what one of the most rigorous studies on leadership aptitude has uncovered.

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What the Largest Study on CEO Aptitude Personality Traits Actually Found

The research in question — “Are CEOs Born Leaders? Lessons from Traits of a Million Individuals” — was conducted by researchers affiliated with the University of New South Wales, Aalto University, and Harvard Business School, and was published in 2015. The study is remarkable not just for its conclusions, but for the sheer scale and quality of its data. Rather than relying on surveys or interviews with existing executives, the researchers tracked the measurable traits of roughly 1.3 million Swedish men from age 18, then followed their career outcomes decades later.

At age 18 — before most had any significant professional experience — participants underwent mandatory military assessments measuring 3 core characteristics: cognitive ability, non-cognitive ability (a broad personality measure), and physical height. These measurements were taken at a point in life where formal education and career experience had minimal influence, making the data a closer approximation of baseline, near-innate traits. Of the 1.3 million men studied, approximately 26,000 went on to become CEOs, providing a statistically robust sample for comparison. The observation window covered career data from 2004 to 2010, yielding roughly 9 million person-year observations.

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Measuring traits before career development began is what makes this study uniquely credible. At 18, most individuals have not yet entered the workforce, completed higher education, or been shaped significantly by professional environments. The abilities recorded at this stage therefore reflect something closer to a person’s foundational potential — what researchers sometimes call “pre-labor-market traits.” Because military conscription was compulsory at the time, participation was near-universal, meaning the data has very little selection bias. This contrasts with studies that survey existing CEOs and ask them to self-report their traits — a method that is far more prone to distortion and hindsight bias.

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CEO Aptitude Personality Traits: Above Average, But Not Off the Charts

One of the study’s most striking findings is that CEOs score higher than the general population — but they are not superhuman outliers. Large-company CEOs scored at approximately the top 17% for cognitive ability. That means in a room of 100 people, they would rank somewhere around 17th from the top — clearly above average, but nowhere near the top 1% that the “born genius” narrative would suggest. When all 3 traits are combined into a composite score, large-company CEOs place in roughly the top 5% of the population.

• Cognitive ability alone: CEOs score in approximately the top 17% — elevated, but not extreme
• Combined 3-trait composite: Large-company CEOs reach roughly the top 5%
• Number of people at or above this level: Approximately 60,000 individuals in the studied population

This last point is critical. There are roughly 60,000 people who score as high as or higher than the median large-company CEO — yet the vast majority of them never become CEOs at all. Think of it like athletic ability: plenty of people have the physical capacity to compete at a high level, but only a small fraction ever make a national team. Raw talent is a threshold requirement, not a guarantee of success. Research suggests that other factors — opportunity, timing, organizational context, and even luck — play a substantial role in determining who ultimately reaches the executive suite.

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The 3 Traits of Successful CEOs — and How Each One Matters

The study measured 3 distinct characteristics, each of which independently predicts CEO attainment — but with very different weights. Understanding what these traits are and how strongly they relate to executive leadership gives us a much clearer picture of what “leadership aptitude” actually means in measurable terms.

1. Cognitive Ability: Necessary, But Not Sufficient

Cognitive ability refers to the capacity to think logically, understand language, mentally manipulate spatial information, and grasp technical or mechanical concepts. In the study, it was assessed across 4 sub-tests: logical reasoning, verbal comprehension, spatial visualization, and technical understanding — all scored on a 9-point scale with a population average of around 5. Large-company CEOs averaged approximately 7.2 out of 9, compared to about 6.0 for small-company CEOs. For context, medical doctors averaged around 7.5 — slightly higher than large-company CEOs, but in a comparable range. This places executive cognitive ability in the same tier as highly selective professions, reinforcing that CEOs are genuinely intelligent, but not in a category entirely separate from other high-achieving professionals.

2. Non-Cognitive Ability: The Strongest Predictor of CEO Success

Non-cognitive ability was the single most powerful predictor of CEO attainment in the study, accounting for approximately 58% of the combined trait index’s predictive weight — roughly twice the contribution of cognitive ability (around 31%). Non-cognitive ability in this context was assessed through structured interviews and encompasses traits such as:

• Responsibility and dependability: Following through on commitments and taking ownership of outcomes
• Perseverance and grit: Maintaining effort and focus in the face of setbacks or obstacles
• Emotional stability: Regulating emotions under pressure and avoiding reactive decision-making
• Initiative and self-direction: Proactively seeking solutions rather than waiting to be told what to do
• Social maturity: The ability to navigate interpersonal relationships effectively and influence others

These are sometimes called “soft skills,” but that label drastically undersells their importance. The regression coefficient for non-cognitive ability in predicting CEO status was approximately 0.59, compared to 0.31 for cognitive ability — making personality-related traits nearly twice as influential. The intuitive explanation is straightforward: leading an organization is fundamentally a human endeavor. It requires motivating teams, making judgment calls under uncertainty, maintaining composure in crises, and communicating vision across an entire workforce. Raw intellectual processing power, while useful, cannot substitute for these interpersonal and emotional capacities.

3. Physical Height: A Small but Measurable Factor

The study also found a modest association between height and CEO attainment. The average height among large-company CEOs was approximately 183 cm (about 6 feet), compared to a population average of around 179 cm — a difference of roughly 3 centimeters. Researchers estimated that each additional centimeter of height was associated with roughly 0.9 IQ-point equivalent of predictive value for CEO attainment. While this finding is statistically real, its practical significance is limited — height accounts for only about 12% of the combined trait index, and the mechanism likely runs through indirect channels such as perceived authority, physical confidence, or social impressions formed in early organizational settings rather than any direct causal pathway.

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Why Having the Right Traits Still Doesn’t Guarantee the Top Job

Perhaps the most important — and underappreciated — finding of the study is that high traits alone are far from sufficient to predict who becomes a CEO. As noted earlier, approximately 60,000 individuals in the studied population scored at or above the median large-company CEO on the combined trait index. Yet the vast majority of these people never reached the CEO role. Instead, many remained in senior management, middle leadership, or technical expert positions. The study found that more than 100 times as many high-trait individuals were working as managers rather than as large-company CEOs at any given point.

Even more revealing is the data on compensation. Large-company CEOs earned wages approximately 12 times higher than the average worker in the sample — yet the 3 measured traits (cognitive ability, non-cognitive ability, and height) collectively explained only about 10% of this wage premium. If innate traits were truly the dominant driver of executive success and compensation, one would expect a much larger share of the pay gap to be accounted for by these characteristics. The fact that 90% of the wage premium remains unexplained by traits alone suggests that factors such as social networks, organizational politics, industry dynamics, timing, and access to education and mentorship play enormously important roles that the “born leader” narrative tends to ignore.

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