I’m struck by how many brilliant people I meet who misuse their intellect.

At first, I’m intrigued by how quickly they connect disparate concepts and curious to learn. But inevitably, something shifts. The energy flattens. Friction builds. They are not listening – trapped in the performance of their own brilliance.

Embarrassingly, I try to be brilliant and compete or shut down. Walking away is the wiser choice.

I see the same pattern in teams. When one brilliant member dominates, the conversation narrows. Others grow competitive or guarded. Innovation slows. Trust frays.

Brilliance can resemble charisma or confidence. But over time, it silences other perspectives and resists challenge. Dazzled, we overlook whether the thinking is rigorous. Brilliance may impress, but rigour requires the quieter discipline to test assumptions, think with others, and stay with uncertainty.

We live in a culture that rewards brilliance early. From school to the boardroom, we’re taught to value quick answers and strong opinions. Leaders are promoted not for navigating complexity, but for commanding attention and appearing decisive. Hence dominance is prized over listening, and certainty is mistaken for wisdom.

In my experience, brilliant leaders often fall into one of three traps.

Some over index on logic and analysis. Their intellect becomes a fortress – impressive, but impenetrable to hearing others. They excel at structuring arguments and spotting flaws but struggle to access deeper insight from the heart, the body, or the group. They leave us feeling unheard. Their decisions, though technically sound, miss the human nuance that determines whether a strategy will work and be implemented. 

Others rely on sharp, accurate intuition, making quick decisions and trusting their gut. While a strength, it becomes a liability when it bypasses the discipline of rigorous thinking. They resist slowing down to reflect, consult others or test assumptions. In complexity – where ambiguity reigns and trade-offs are subtle – this leads to simplistic choices that unravel later. Their brilliance becomes brittle: impressive in the moment but unfit for the long term.

A minority are emotionally astute. They read people well and use that awareness to influence outcomes. But when disconnected from integrity, this can turn manipulative: using emotion to bond teams to them personally, while avoiding challenge and skewing decisions to serve their image over the mission.

In cultures that worship brilliance, we promote leaders who struggle to think systemically. We teach them to see the world in binaries: logical or illogical, efficient or inefficient, loyal or disloyal.

But complexity demands more than brilliance. It calls for rigour – the discipline to think with others, test assumptions, and stay with uncertainty. It asks for range: intellect, yes, but also empathy, discernment, and the humility to listen. Leadership today needs less spectacle, more substance.